Effect of substrate preheating on the photovoltaic performance of ZnO nanorod-based perovskite solar cells

Wei Shuo Li*, Tsyr Rou Lin, Hsiu Ting Yang, Yu Ren Li, Kai Chi Chuang, Yi Shao Li, Jun Dao Luo, Chain Shu Hus, Huang-Chung Cheng

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

In this study, zinc oxide nanorods (ZnO-NRs) grown via a low-temperature hydrothermal growth process are used as the electron transport layer (ETL) owing to their low temperature process and three-dimensional structure, which increases the surface area and thereby improves photovoltaic performance. To further improve the performance of solar cells, substrate preheating before spin-coating PbI2 and perovskite films was conducted. With the increase in preheating temperature, the grain size, surface uniformity, and crystallinity of perovskite increased. Consequently, the photovoltaic performances of the devices with 150-nm-long ZnO-NRs and substrate preheating at 150 °C showed an optimum open-circuit voltage (Voc) of 0.84 V, a short-circuit current (Jsc) of 21.43 mA/cm2, a fill factor (FF) of 57.42%, and a power conversion efficiency (PCE) of 10.34% owing to the superior quality of the perovskite films having smooth surfaces with fewer pinholes.

Original languageEnglish
Article number06KB03
JournalJapanese Journal of Applied Physics
Volume57
Issue number6
DOIs
StatePublished - 1 Jun 2018

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    Li, W. S., Lin, T. R., Yang, H. T., Li, Y. R., Chuang, K. C., Li, Y. S., Luo, J. D., Hus, C. S., & Cheng, H-C. (2018). Effect of substrate preheating on the photovoltaic performance of ZnO nanorod-based perovskite solar cells. Japanese Journal of Applied Physics, 57(6), [06KB03]. https://doi.org/10.7567/JJAP.57.06KB03