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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
Low-Temperature Processed TiOx/Zn1-xCdxS Nanocomposite for Efficient MAPbIxCl1-x Perovskite and PCDTBT:PC70BM Polymer
Binh Duong1, Khathawut Lohawet2, Tanyakorn Muangnapoh3
1National Nanotechnology Center, 111 Thailand Science Park, Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand. bduong07@gmail.com.
Abstract:
The majority of high-performance perovskite and polymer solar cells consist of a TiO2 electron transport layer (ETL) processed at a high temperature (>450 °C). Here, we demonstrate that low-temperature (80 °C) ETL thin film of TiOx:Zn1-xCdxS can be used as an effective ETL and its band energy can be tuned by varying the TiOx:Zn1-xCdxS ratio. At the optimal ratio of 50:50 (vol%), the MAPbIxCl1-x perovskite and PCBTBT:PC70BM polymer solar cells achieved 9.79% and 4.95%, respectively. Morphological and optoelectronic analyses showed that tailoring band edges and homogeneous distribution of the local surface charges could improve the solar cells efficiency by more than 2%. We proposed a plausible mechanism to rationalize the variation in morphology and band energy of the ETL.
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