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Stable perovskite solar cells with efficiency exceeding 24.8% and 0.3-V voltage loss

2020; American Association for the Advancement of Science; Volume: 369; Issue: 6511 Linguagem: Inglês

10.1126/science.abb7167

1095-9203

Mingyu Jeong, In Woo Choi, Eun Min Go, Yongjoon Cho, Minjin Kim, Byongkyu Lee, Seonghun Jeong, Yimhyun Jo, Hyewon Choi, Jiyun Lee, Jin‐Hyuk Bae, Sang Kyu Kwak, Dong Suk Kim, Changduk Yang,

Organic Electronics and Photovoltaics

Operating in wet conditions The high efficiency of the complex organic molecule Spiro-OMeTAD as a hole-transporting material for perovskite solar cells requires the use of hygroscopic dopants that decrease stability. Jeong et al. synthesized hydrophobic fluorinated analogs of Spiro-OMeTAD as hole-transporting materials that have favorable shifting of the electronic state for hole extraction and used them to fabricate perovskite solar cells. A champion device had a certified power conversion efficiency of 24.8% and an open-circuit voltage near the Shockley-Queisser limit. These devices could maintain more than 87% of the original power conversion efficiency under 50% relative humidity for more than 500 hours. Science , this issue p. 1615