| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 107 === This thesis reports the development of large-area perovskite solar cells by a blade coating process. The first part is to optimize the precursor solution and improve the thin-film uniformity. The composition of the precursor solution is the key to affect the uniformity and quality of the perovskite thin film. Analyzed the effects of different amounts of Tween60 (C64H126O26) and dimethylhydrazine ((CH3)2SO) on methylammonium lead halide (MAPbI3, MA=CH3NH3) thin films. The solution was doped with 330 ppm Tween60 and 1 M DMSO, and the film showed 110 preferred orientation, large grain size, high uniformity, and the PCE achieved 10.3% at an effective area of 0.1 cm2.
The second part is to optimize the blading process gap and particle size of titanium dioxide (TiO2) that improved the efficiency. The electrical hysteresis properties and the FF was improved by adjusting the gap during blade casting, the particle size of TiO2, the MAPbI3 thickness to achieve ~300 nm, and the filling on TiO2. . Finally, the PCE was improved from 10.3% to 14.8% by using 300 μm as the gap during blading process and an 30-nm-thick TiO2.
The third part discusses the process of large-area perovskite solar cells. The resistance was markedly increased by increasing the effective area, because the distance between the FTO electrodes is very large that increases the transmission distance of carriers. The resistance of the FTO was reduced by evaporating gold wires so that the carrier can be effectively transmitted to the receiving electrode. The PCE achieved 11.9% by increasing the active area from 0.1cm2 to 2.4 cm2 .
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