Morphology Control of SnO2 Layer for Efficient Perovskite Solar Cells through a Solvent Engineering Strategy
Chongyang Xu a, Eun-Cheol Lee a
a Gachon University, Department of Nano-Physics, Republic of Korea, Seongnam, Gyeonggi, Corea del Sur, Seongnam, Korea, Republic of
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP20)
Tsukuba-shi, Japan, 2020 January 20th - 22nd
Organizers: Michio Kondo and Takurou Murakami
Poster, Chongyang Xu, 060
Publication date: 14th October 2019

Because of the continuous rising of power conversion efficiency (PCE), a perovskite solar cell (PSC) is considered as one of the most promising alternatives to Si-based solar cells. Although TiO2 has been widely used as an electron transport layer (ETL) in the n-i-p (regular) type PSCs, serious of its disadvantages such as high processing temperature, low bulk electron mobility and highly catalytic activity, hindered a higher photovoltaic performance and better environmental stability of the PSCs. To overcome this issue, SnO2 is developed as an ETL for PSCs owing to the low-temperature requirement, suitable energy levels, and higher electron mobility. In this work, we effectively controlled the morphology of SnO2 ETL by adding organic solvents into SnO2 precursors. This approach can improve wettability of SnO2 precursor on glass substrate and improve the stability of SnO2 colloidal dispersion. A full-covered SnO2 film with homogenous morphology and free-aggregation can be obtained using ethanol, which is beneficial for boosting the performance of PSCs. PCE of the PSCs with ethanol processed SnO2 exhibited a high PCE of 18.84%, with improved environmental stability. Our investigation provides a simple and effective approach for achieving high performance SnO2-based PSCs.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info