High-efficiency solution-processed perovskite solar cells with millimeter-scale grains

Wanyi Nie, Hsinhan Tsai, Reza Asadpour, Jean Christophe Blancon, Amanda J. Neukirch, Gautam Gupta, Jared J. Crochet, Manish Chhowalla, Sergei Tretiak, Muhammad A. Alam, Hsing Lin Wang, Aditya D. Mohite

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2048 Citations (Scopus)

Abstract

State-of-the-art photovoltaics use high-purity, large-area, wafer-scale single-crystalline semiconductors grown by sophisticated, high-temperature crystal growth processes. We demonstrate a solution-based hot-casting technique to grow continuous, pinhole-free thin films of organometallic perovskites with millimeter-scale crystalline grains. We fabricated planar solar cells with efficiencies approaching 18%, with little cell-to-cell variability. The devices show hysteresis-free photovoltaic response, which had been a fundamental bottleneck for the stable operation of perovskite devices. Characterization and modeling attribute the improved performance to reduced bulk defects and improved charge carrier mobility in large-grain devices.We anticipate that this technique will lead the field toward synthesis of wafer-scale crystalline perovskites, necessary for the fabrication of high-efficiency solar cells, and will be applicable to several other material systems plagued by polydispersity, defects, and grain boundary recombination in solution-processed thin films.

Original languageEnglish
Pages (from-to)522-525
Number of pages4
JournalScience
Volume347
Issue number6221
DOIs
Publication statusPublished - Jan 30 2015

ASJC Scopus subject areas

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    Nie, W., Tsai, H., Asadpour, R., Blancon, J. C., Neukirch, A. J., Gupta, G., Crochet, J. J., Chhowalla, M., Tretiak, S., Alam, M. A., Wang, H. L., & Mohite, A. D. (2015). High-efficiency solution-processed perovskite solar cells with millimeter-scale grains. Science, 347(6221), 522-525. https://doi.org/10.1126/science.aaa0472