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We report the perovskite:SWNTs solar cells fabricated using solvent-solvent extraction (SSE) method at room temperature. Small quantities of Single-walled carbon nanotubes (SWNTs) are incorporated into perovskite Methylammonium lead halide (CH3NH3PbI3) layer, and enhance the power conversion efficiency (PCE) of the perovskite solar cell from 8.5% to 10.6%. SWNTs act as hole transport channels boosting...
Nano-optoelectronic sensors and devices bring tremendous revolutions in photoelectric conversion due to dimension reduced. The device geometry dominates the electron transport so that the spatially resolved optoelectronics properties are critical to characterize device performance. In this paper, it reports a two-photon pulsed laser scanning microscopy method which utilizes raster scan on device with...
Metal oxides have been shown to have wide ranging material, physical and chemical properties while 2D materials has it unique two-dimensional planar structure and in this review, we show that a hybrid composite utilizing carbon nanotubes are used as a base template, forming a hybrid core-shell type of nanostructure, effectively enhances and extends the range of applications. There are two unique properties...
Ink property for high-quality printed carbon nanotube (CNT) transistor was investigated and it was found that adhesion property of the semiconducting (s-) CNT micelles was a key issue. Anionic surfactants would prevent the s-CNT micelles from being adsorbed to the surface which was functionalized by amino groups and deteriorate the device characteristics. High-quality and high-uniform CNT transistors...
In this work, a comparison between the electro-optical characteristics of CNT random networks obtained through inkjet printing and spray-deposition on flexible substrates is presented. Transmittance values are similar in both fabrication techniques; however, the sheet resistance of the inkjetted layers diverges significantly with respect to the reference spray-deposited thin film. To overcome this...
In this work, we present the electrodeposition of nickel (Ni)-carbon nanotube (CNT) composite thin films and evaluate the CNT weight percentage in films using energy-dispersive x-ray spectroscopy (EDX). To increase the CNTs codeposition, the CNTs are functionalized with positive charges and the composite thin films are deposited with different current waveforms. Furthermore, two kinds of composite...
Time-controlled pulse plasma CVD has been developed aiming for the mass production of narrow chirality distributed single-walled carbon nanotubes (SWNTs). Through the comparison of continuous plasma CVD and pulse plasma CVD, it is found that the amount of SWNTs can be increased in keeping with the initial narrow chirality distribution by repeating pulse plasma CVD. The effects of pulse time parameter,...
Multi-walled carbon nanotubes (MWCNTs) have been used to improve the lifetime of electrical contacts of MEMS switches. The surface, usually gold-coated, demonstrates a complex structure. Due to the space between vertically aligned nanotubes, the sputtered gold penetrates into CNT. The surface of the composite also presents a much higher roughness than metal-coated surfaces. This work investigates...
In this paper, a theoretical and Monte-Carlo analysis on the percolation behavior of single-walled carbon nanotube (SWNT) network is proposed. For such network structures that are commonly used as the conduction channels of thin-film transistors (TFTs), the dependence of channel resistance on channel length, tube density, and average tube length is carefully studied. The tube-tube contact resistance...
In contrast to the reported open-shell zigzag [6]n cyclacenes and short nanotubes (n=5−10), their analogues which contain alternating Ge-C bonds, appear with unstable singlet open-shell (Sos) electronic ground states, at unrestricted broken spin-symmetry B3LYP and BPW91 levels of theory (n=the number of fused benzenoid rings). We have boosted their stability by implementing altering Ge-C bonds that...
Through glass vias (TGVs) is the core technology of three dimensional (3-D) integration. This paper extracts the equivalent electrical parameters of carbon nanotube (CNT) based TGVs and establishes the distributed transmission line model of ground-signal-signal-ground (GSSG) type TGV interconnects. Based on the proposed equivalent circuit model, the effect of various design parameters, such as via...
Surface effect and nonlocal effect are incorporated into classical Euler beam equation to study the static bending behavior of nanobridges. The generalized Young-Laplace equation and core-shell model are used to model the surface effect. The nonlocal effect is introduced in bending moment equation. Results show that a positive surface tension causes the nanobridge more difficult to bend while the...
Fully transparent solution-processed carbon nanotube thin film transistors (CNT-TFTs) on flexible substrate are proposed and fabricated by a facile and low-cost process. By using 95%-semiconducting enriched carbon nanotubes as channel and transparent indium tin oxide as gate, source and drain electrodes, CNT-TFTs with a high on/off current ratio of 2.68×106, a low threshold voltage of 0.38 V, a steep...
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