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Erschienen in:
20.11.2015
Atmospheric preparation of ZnO thin films by mist chemical vapor deposition for spray-coated organic solar cells
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 3/2016
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Abstract
We deposited large-scale ZnO films on FTO/glass substrates have been prepared and characterized using mist chemical vapor deposition at different temperatures ranging from 350 to 450 °C. The performance of poly(3-hexylthiophene):[6, 6]-phenyl C61-butyric acid methyl ester (P3HT:PCBM) based organic solar cells (OSCs) was used to demonstrate the electron transport performance of differently prepared ZnO films. We found that the photovoltaic performance of spray-coated OSC is more affected by the phase composition than the morphology or optical transmittance. The short circuit current (JSC) of spray-coated OSCs is strongly affected by the mixed phase in ZnO and led to a low device performance. OSCs with ZnO cathode buffer layers deposited at 400 and 450 °C performed better, with a power conversion efficiency of 3.44 and 3.51 %, respectively. In addition, a maximum output power as high as 110 mW was measured for large OSCs, which indicates that the described method is also suitable for large-scale OSC fabrication.