Unraveling the high performance of tri-iodide perovskite absorber based photovoltaics with a non-polar solvent washing treatment

Kuen Feng Lin, Sheng Hsiung Chang, Kai Hung Wang, Hsin Ming Cheng, Kuo Yuan Chiu, Kun Mu Lee, Sheng Hui Chen, Chun Guey Wu

研究成果: 雜誌貢獻期刊論文同行評審

66 引文 斯高帕斯(Scopus)

摘要

A comprehensive study was carried out to understand the formation of a crystalline tri-iodide perovskite absorber (TPA) on top of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Scanning electron microscopy, two-dimensional X-ray diffraction and nanosecond time-resolved photoluminescence were used to explore the correlation between the surface morphology and the exciton lifetime in TPA fabricated with and without the in-situ toluene washing treatment. The toluene washing treatment decreases the crystallinity (exciton lifetime) of TPA and improves the TPA coverage on the non-crystalline PEDOT:PSS surface. The high average power conversion efficiency (PCE) of 10.61% achieved can be explained as due to the efficient exciton dissociation at the interface between the TPA and the PEDOT:PSS. The experimental results show that the PCE can be further improved when the crystallinity of TPA and the TPA coverage on PEDOT:PSS are simultaneously optimized.

原文???core.languages.en_GB???
頁(從 - 到)309-314
頁數6
期刊Solar Energy Materials and Solar Cells
141
DOIs
出版狀態已出版 - 23 6月 2015

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