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The stability of perovskite solar cells (PSCs) are critically related to the perovskite crystal morphology and film quality, hence controlling the perovskite film formation is one of the key concerns. In this study, we have used four anti-solvents- toluene, chlorobenzene, p-xylene and ether to fabricate high quality CH3NH3PbI3 perovskite films. We investigated the surface morphology, optical and structural...
In this letter, we have introduced copper chloride (CuCl2) as an additive in the CH3NH3PbI3 precursor solution to improve the surface morphology and crystallinity of CH3NH3PbI3 films in a single solvent system. Our optimized perovskite solar cells (PSCs) with 2.5 mol% CuCl2 additive showed best power conversion efficiency (PCE) of 15.22%. The PCE of the PSCs fabricated by CuCl2 (2.5 mol%) additive...
We investigate the effects of Ga deposition rate (R) and antimony flux (P) on the morphology of GaSb quantum dots (QDs). GaSb QDs are formed on GaAs at 420 °C by Stranski-Krastanov (SK) mode under various conditions of R (0.13 ∼ 0.73 monolayer (ML)/s) and P (1.0 ∼ 4.2 × 10−7 Torr). An atomic microscope study shows that the density n of GaSb QDs is markedly affected by P and R; no (or few) QDs are...
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