Search results for: Gerrit Boschloo

Items from 1 to 20 out of 91 results

article

Methylammonium Bromide Assisted Crystallization for Enhanced Lead‐Free Double Perovskite Photovoltaic Performance

Hua Wu, Yunfei Wang, Aijie Liu, Junxin Wang, more

Advanced Functional Materials > 32 > 14 > n/a - n/a

Cs₂AgBiBr₆, has recently gained wide attention as a possible alternative to lead‐halide perovskites, considering the nontoxicity and improved stability. However, this double perovskite suffers from defects, especially deep electron traps, severely hampering the photovoltaic performance. This work reports a simple method to control the double perovskite crystallization by adding volatile salts into...

article

On the Mechanistic Understanding of Photovoltage Loss in Iron Pyrite Solar Cells

Mohammad Rahman, Gerrit Boschloo, Anders Hagfeldt, Tomas Edvinsson

Advanced Materials > 32 > 26 > n/a - n/a

Considering the natural abundance, the optoelectronic properties, and the electricity production cost, iron pyrite (FeS₂) has a strong appeal as a solar cell material. The maximum conversion efficiency of FeS₂ solar cells demonstrated to date, however, is below 3%, which is significantly below the theoretical efficiency limit of 25%. This poor conversion efficiency is mainly the result of the poor...

article

Lithium‐Ion Endohedral Fullerene (Li⁺@C₆₀) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti‐Oxidation

Il Jeon, Hiroshi Ueno, Seungju Seo, Kerttu Aitola, more

Angewandte Chemie International Edition > 57 > 17 > 4607 - 4611

Herein, we report use of [Li⁺@C₆₀]TFSI⁻ as a dopant for spiro‐MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10‐fold that of conventional devices using Li⁺TFSI⁻. Such high stability is attributed to the hydrophobic nature of [Li⁺@C₆₀]TFSI⁻ repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore,...

article

Lithium‐Ion Endohedral Fullerene (Li⁺@C₆₀) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti‐Oxidation

Il Jeon, Hiroshi Ueno, Seungju Seo, Kerttu Aitola, more

Angewandte Chemie > 130 > 17 > 4697 - 4701

article

Analysis of crystalline phases and integration modelling of charge quenching yields in hybrid lead halide perovskite solar cell materials

Byung-wook Park, Xiaoliang Zhang, Erik M.J. Johansson, Anders Hagfeldt, more

Nano Energy > 2017 > 40 > C > 596-606

Organic inorganic metal halide perovskites (OIHPs) has emerged as promising photovoltaic materials the latest years. Many OIHPs, however, have complex material compositions with mixed cation and halide compositions, phase mixtures, as well as beneficial remains of PbI₂ in the final solar cell materials where the complex material composition with dual conduction and valence band states and its effects...

article

Multifunctional Gadolinium‐Doped Mesoporous TiO₂ Nanobeads: Photoluminescence, Enhanced Spin Relaxation, and Reactive Oxygen Species Photogeneration, Beneficial for Cancer Diagnosis and Treatment

Roghayeh Imani, Ralf Dillert, Detlef W. Bahnemann, Meysam Pazoki, more

Small > 13 > 20 > n/a - n/a

Materials with controllable multifunctional abilities for optical imaging (OI) and magnetic resonant imaging (MRI) that also can be used in photodynamic therapy are very interesting for future applications. Mesoporous TiO₂ sub‐micrometer particles are doped with gadolinium to improve photoluminescence functionality and spin relaxation for MRI, with the added benefit of enhanced generation of reactive...

article

High Temperature‐Stable Perovskite Solar Cell Based on Low‐Cost Carbon Nanotube Hole Contact

Kerttu Aitola, Konrad Domanski, Juan‐Pablo Correa‐Baena, Kári Sveinbjörnsson, more

Advanced Materials > 29 > 17 > n/a - n/a

Mixed ion perovskite solar cells (PSC) are manufactured with a metal‐free hole contact based on press‐transferred single‐walled carbon nanotube (SWCNT) film infiltrated with 2,2,7,‐7‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,90‐spirobifluorene (Spiro‐OMeTAD). By means of maximum power point tracking, their stabilities are compared with those of standard PSCs employing spin‐coated Spiro‐OMeTAD and a...

article

Design, synthesis and application of a π-conjugated, non-spiro molecular alternative as hole-transport material for highly efficient dye-sensitized solar cells and perovskite solar cells

Peng Liu, Bo Xu, Yong Hua, Ming Cheng, more

Journal of Power Sources > 2017 > 344 > C > 11-14

Two low-cost, easily synthesized π-conjugated molecules have been applied as hole-transport materials (HTMs) for solid state dye-sensitized solar cells (ssDSSCs) and perovskite solar cells (PSCs). For X1-based devices, high power conversion efficiencies (PCEs) of 5.8% and 14.4% in ssDSSCs and PSCs has been demonstrated. For X14-based devices, PCEs were improved to 6.1% and 16.4% in ssDSCs and PSCs,...

article

Acceptor–Donor–Acceptor type ionic molecule materials for efficient perovskite solar cells and organic solar cells

Ming Cheng, Kerttu Aitola, Cheng Chen, Fuguo Zhang, more

Nano Energy > 2016 > 30 > C > 387-397

Perovskite solar cells (PSCs) have attracted significant interest and hole transporting materials (HTMs) play important roles in achieving high efficiency. Here, we report additive free ionic type HTMs that are based on 2-ethylhexyloxy substituted benzodithiophene (BDT) core unit. With the ionization of end-capping pyridine units, the hole mobility and conductivity of molecular materials are greatly...

article

Thermal Stability Study of Dye-Sensitized Solar Cells with Cobalt Bipyridyl–based Electrolytes

Wenxing Yang, Yan Hao, Pedram Ghamgosar, Gerrit Boschloo

Electrochimica Acta > 2016 > 213 > C > 879-886

Dye-sensitized solar cells (DSSCs) with cobalt bipyridyl–based electrolytes can display higher solar cell performance than their iodide/triiodide counterpart. There is, however, little knowledge on their long term stability, which is a crucial aspect for potential commercial application. Herein, we studied the thermal stability of DSSCs using Co(bpy)₃^2+/3+ redox electrolyte at 70°C in the dark for...

article

The effect of mesoporous TiO2 pore size on the performance of solid-state dye sensitized solar cells based on photoelectrochemically polymerized Poly(3,4-ethylenedioxythiophene) hole conductor

Jinbao Zhang, Meysam Pazoki, Justus Simiyu, Malin B. Johansson, more

Electrochimica Acta > 2016 > 210 > C > 23-31

Photoelectrochemical polymerization of poly(3,4-ethylenedioxythiphene) (PEDOT) has recently been introduced and widely investigated for fabrication of the hole transporting material (HTM) in highly efficient solid state dye sensitized solar cells (sDSCs). In this work, the effects of the surface area and pore size of TiO₂ film were for the first time investigated in the sDSCs employing the in-situ...

article

Facile synthesis of fluorene-based hole transport materials for highly efficient perovskite solar cells and solid-state dye-sensitized solar cells

Yong Hua, Jinbao Zhang, Bo Xu, Peng Liu, more

Nano Energy > 2016 > 26 > C > 108-113

Two novel low-cost fluorene-based hole transport materials (HTMs) HT1 and HT2 as alternatives to the expensive HTM Spiro-OMeTAD have been designed and synthesized for the application in perovskite solar cells (PSCs) and solid-state dye-sensitized solar cell (ssDSCs). The two HTMs were prepared through a facile two-step reaction from cheap starting material and with a total yield higher than 90%. These...

article

Kinetic study of carminic acid and santalin natural dyes in dye-sensitized solar cells

Su Htike Aung, Yan Hao, Than Zaw Oo, Gerrit Boschloo

Journal of Photochemistry and Photobiology A: Chemistry > 2016 > 325 > C > 1-8

The performance of natural dyes in dye-sensitized solar cells is usually worse than that of purpose-built organic dyes. Here, we set out to investigate the underlying origins. Two natural dyes, carminic acid and santalin, were selected as potential sensitizers for dye-sensitized solar cells. They were compared to a state-of-the-art organic sensitizer, LEG4, in devices using relatively thin (5μm),...

article

Physicochemical identity and charge storage properties of battery-type nickel oxide material and its composites with activated carbon

Narjes Bagheri, Alireza Aghaei, Nick Vlachopoulos, Magdalena Skunik-Nuckowska, more

Electrochimica Acta > 2016 > 194 > C > 480-488

The structural properties of annealed nickel oxide and its composites with activated carbon (synthesized via simple precipitation methods) have been addressed using X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption/desorption method and scanning electron microscopy. The charge storage properties of materials have also been investigated in three- and two-electrode configurations...

article

Efficient solid-state dye sensitized solar cells: The influence of dye molecular structures for the in-situ photoelectrochemically polymerized PEDOT as hole transporting material

Jinbao Zhang, Nick Vlachopoulos, Mohamed Jouini, Malin B. Johansson, more

Nano Energy > 2016 > 19 > C > 455-470

Solid-state dye sensitized solar cells (sDSCs) with organic small molecule hole transporting materials (HTMs) have limited efficiencies due to the incomplete pore filling of the HTMs in the thick mesoporous electrodes and the low hole conductivity of HTMs. Hereby, highly efficient sDSCs with power conversion efficiency of 7.11% and record photocurrent of 13.4mAcm⁻² are reported, prepared by effectively...

article

Bismuth Based Hybrid Perovskites A₃Bi₂I₉ (A: Methylammonium or Cesium) for Solar Cell Application

Byung‐Wook Park, Bertrand Philippe, Xiaoliang Zhang, Håkan Rensmo, more

Advanced Materials > 27 > 43 > 6806 - 6813

Low‐toxic bismuth‐based perovskites are prepared for the possible replacement of lead perovskite in solar cells. The perovskites have a hexagonal crystalline phase and light absorption in the visible region. A power conversion efficiency of over 1% is obtained for a solar cell with Cs₃Bi₂I₉ perovskite, and it is concluded that bismuth perovskites have very promising properties for further development...

article

Stark effects in D35-sensitized mesoporous TiO2: influence of dye coverage and electrolyte composition

Meysam Pazoki, Anders Hagfeldt, Gerrit Boschloo

Electrochimica Acta > 2015 > 179 > C > 174-178

Strong Stark effects are visible in the spectra of the organic donor-pi-acceptor dye D35 when it is adsorbed onto mesoporous TiO₂, both under steady state conditions and under modulated light conditions. The addition of lithium cations to the electrolyte results in a significant red shift of the D35 absorption spectrum, which is attributed to adsorption of Li⁺ at the TiO₂ surface, resulting in a change...

article

Photoelectrochemical Polymerization of EDOT for Solid State Dye Sensitized Solar Cells: Role of Dye and Solvent

Jinbao Zhang, Adel Jarboui, Nick Vlachopoulos, Mohamed Jouini, more

Electrochimica Acta > 2015 > 179 > C > 220-227

The aromatic-unit, commercially available, and cost-effective precursor 3, 4-ethylenedioxythiophene (EDOT), was employed instead of bis-EDOT to generate by in-situ photoelectrochemical polymerization (PEP) a conducting polymer-type hole conductor poly (3, 4-ethylenedioxythiophene) (PEDOT) for dye sensitized solar cell (DSC) devices. In order to conduct efficiently the PEP of EDOT, two electrolytic...

article

Laser desorption/ionization mass spectrometry of dye‐sensitized solar cells: identification of the dye‐electrolyte interaction

Hanna Ellis, Valentina Leandri, Anders Hagfeldt, Gerrit Boschloo, more

Journal of Mass Spectrometry > 50 > 5 > 734 - 739

Dye‐sensitized solar cells (DSCs) have great potential to provide sustainable electricity from sunlight. The photoanode in DSCs consists of a dye‐sensitized metal oxide film deposited on a conductive substrate. This configuration makes the photoanode a perfect sample for laser desorption/ionization mass spectrometry (LDI‐MS). We applied LDI‐MS for the study of molecular interactions between a dye...

article

Carbon nanotube film replacing silver in high-efficiency solid-state dye solar cells employing polymer hole conductor

Kerttu Aitola, Jinbao Zhang, Nick Vlachopoulos, Janne Halme, more

Journal of Solid State Electrochemistry > 2015 > 19 > 10 > 3139-3144

A semitransparent, flexible single-walled carbon nanotube (SWCNT) film was efficiently used in place of evaporated silver as the counter electrode of a poly(3,4-ethylenedioxythiophene) polymer-based solid-state dye solar cell (SSDSC): the solar-to-electrical energy conversion efficiency of the SWCNT-SSDSC was 4.8 % when it was 5.2 % for the Ag-SSDSC. The efficiency difference stemmed from a 0.1-V...

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DYE-SENSITIZED SOLAR CELL (7)
SOLAR CELLS (7)
DYE-SENSITIZED SOLAR CELLS (5)
PEROVSKITE SOLAR CELLS (5)
SOLAR CELL (5)
DYE-SENSITIZED (4)
ELECTRON TRANSPORT (4)
COUNTER ELECTRODE (3)
ELECTROLYTE (3)
NANOSTRUCTURED (3)
NICKEL OXIDE (3)
PHOTOVOLTAICS (3)
TIO2 (3)
TIO 2 (2)
DYE‐SENSITIZED SOLAR CELLS (2)
HOLE CONDUCTOR (2)
LITHIUM (2)
MESOPOROUS (2)
MESOPOROUS TIO2 (2)
NANOSTRUCTURED ELECTRODE (2)
NANOSTRUCTURED TIO2 (2)
PEDOT (2)
PHOTOELECTROCHEMISTRY (2)
STABILITY (2)
TRANSPORT (2)
ACCELERATED TESTING (1)
ADDITIVE (1)
ADSORPTION (1)
AIR STABILITY (1)
AND LEWIS BASE (1)
AQUEOUS ELECTROLYTES (1)
AQUEOUS MICELLAR ELECTROLYTE (1)
ASYMMETRIC SUPERCAPACITOR (1)
BAND GAP GRADING (1)
BAND SHIFT (1)
BATTERY-TYPE MATERIAL (1)
BISMUTHS (1)
CANCER TREATMENT (1)
CARBAZOLE (1)
CARBON NANOTUBE (1)
CARBON NANOTUBE FILM (1)
CARBON NANOTUBES (1)
CATION ADSORPTION (1)
CHARGE CAPACITY (1)
CHARGE COMPENSATION (1)
CHARGE QUENCHING YIELD (1)
CHARGE RECOMBINATION (1)
CHARGE TRANSPORT (1)
CHARGE-TRANSFER RESISTANCE (1)
CL INCLUSION EFFECT (1)
CO-COMPLEX REDOX COUPLE (1)
COBALT (II, III) POLYPYRIDYL REDOX ELECTROLYTE (1)
COBALT COMPLEX (1)
COBALT ELECTROLYTE (1)
COBALT TRIS(BIPYRIDINE) (1)
CONDUCTING POLYMER (1)
CONTACTS (1)
CONTINUOUS PRODUCTION PROCESS (1)
CRYSTAL STRUCTURE (1)
CS 2AGBIBR 6 (1)
CYANOACRYLIC ACID‐BASED DYES (1)
DEFECTS (1)
DIFFUSION (1)
DIPOLE (1)
DONOR MATERIAL (1)
DOPING (1)
DOTIERUNG (1)
DOUBLE LAYER CAPACITANCE (1)
DSC SYSTEM (1)
DYE SENSITIZATION (1)
DYE SENSITIZED SOLAR CELLS (1)
DYE SOLAR CELL (1)
DYE-SENSITIZATION (1)
DYES (1)
DYE‐SENSITISED (1)
EDOT (1)
ELECTROCATALYST (1)
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY (1)
ELECTROCHROMIC DISPLAY (1)
ELECTRON TRANSFER REACTIONS (1)
ELECTRON TRAPPING (1)
ELECTRONIC STRUCTURE (1)
ENERGY CONVERSION (1)
FLUORENE (1)
FULLERENE (1)
FULLERENES (1)
FUNCTIONALIZED DYE MOLECULES (1)
GADOLINIUM (1)
GRÄTZEL CELL (1)
HELMHOLTZ LAYER (1)
HOLE MOBILITY (1)
HOLE TRANSPORT MATERIAL (1)
HOLE-TRANSPORT MATERIAL (1)
HOLE-TRANSPORT MATERIALS (1)
HOLE‐TRANSPORT MATERIALS (1)
HYBRID PEROVSKITE SOLAR CELLS (1)
HYBRID PEROVSKITES (1)
INTEGRATED PHOTOCAPACITOR (1)
IODIDE/TRIIODIDE (1)
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Search results for: Gerrit Boschloo

Methylammonium Bromide Assisted Crystallization for Enhanced Lead‐Free Double Perovskite Photovoltaic Performance

On the Mechanistic Understanding of Photovoltage Loss in Iron Pyrite Solar Cells

Lithium‐Ion Endohedral Fullerene (Li⁺@C₆₀) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti‐Oxidation

Lithium‐Ion Endohedral Fullerene (Li⁺@C₆₀) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti‐Oxidation

Analysis of crystalline phases and integration modelling of charge quenching yields in hybrid lead halide perovskite solar cell materials

Multifunctional Gadolinium‐Doped Mesoporous TiO₂ Nanobeads: Photoluminescence, Enhanced Spin Relaxation, and Reactive Oxygen Species Photogeneration, Beneficial for Cancer Diagnosis and Treatment

High Temperature‐Stable Perovskite Solar Cell Based on Low‐Cost Carbon Nanotube Hole Contact

Design, synthesis and application of a π-conjugated, non-spiro molecular alternative as hole-transport material for highly efficient dye-sensitized solar cells and perovskite solar cells

Acceptor–Donor–Acceptor type ionic molecule materials for efficient perovskite solar cells and organic solar cells

Thermal Stability Study of Dye-Sensitized Solar Cells with Cobalt Bipyridyl–based Electrolytes

The effect of mesoporous TiO2 pore size on the performance of solid-state dye sensitized solar cells based on photoelectrochemically polymerized Poly(3,4-ethylenedioxythiophene) hole conductor

Facile synthesis of fluorene-based hole transport materials for highly efficient perovskite solar cells and solid-state dye-sensitized solar cells

Kinetic study of carminic acid and santalin natural dyes in dye-sensitized solar cells

Physicochemical identity and charge storage properties of battery-type nickel oxide material and its composites with activated carbon

Efficient solid-state dye sensitized solar cells: The influence of dye molecular structures for the in-situ photoelectrochemically polymerized PEDOT as hole transporting material

Bismuth Based Hybrid Perovskites A₃Bi₂I₉ (A: Methylammonium or Cesium) for Solar Cell Application

Stark effects in D35-sensitized mesoporous TiO2: influence of dye coverage and electrolyte composition

Photoelectrochemical Polymerization of EDOT for Solid State Dye Sensitized Solar Cells: Role of Dye and Solvent

Laser desorption/ionization mass spectrometry of dye‐sensitized solar cells: identification of the dye‐electrolyte interaction

Carbon nanotube film replacing silver in high-efficiency solid-state dye solar cells employing polymer hole conductor

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