Journal
SCIENCE
Volume 369, Issue 6511, Pages 1615-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abb7167
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2018R1A2A1A05077194, 2014R1A5A1009799]
- Center for Advanced Soft-Electronics - Ministry of Science and ICT as Global Frontier Project [2012M3A6A5055225]
- Wearable platform Materials Technology Center - Korean Government (MSIT) [2016R1A5A1009926]
- NRF - Ministry of Science, ICT, and Future Planning [2020M1A2A2080746]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20193091010460]
- Ulsan City of UNIST (Ulsan National Institute of Science and Technology) [1.200042]
- Development Program of the Korea Institute of Energy Research (KIER) [C0-2401, C0-2402]
- KISTI-HPC [KSC-2019-CRE-0056]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20193091010460] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [KIER1-1-1] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017H1A2A1046334, 2014R1A5A1009799, 2018R1A2A1A05077194, 2016R1A5A1009926, 4199990113966] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Further improvement and stabilization of perovskite solar cell (PSC) performance are essential to achieve the commercial viability of next-generation photovoltaics. Considering the benefits of fluorination to conjugated materials for energy levels, hydrophobicity, and noncovalent interactions, two fluorinated isomeric analogs of the well-known hole-transporting material (HTM) Spiro-OMeTAD are developed and used as HTMs in PSCs. The structure-property relationship induced by constitutional isomerism is investigated through experimental, atomistic, and theoretical analyses, and the fabricated PSCs feature high efficiency up to 24.82% (certified at 24.64% with 0.3-volt voltage loss), along with long-term stability in wet conditions without encapsulation (87% efficiency retention after 500 hours). We also achieve an efficiency of 22.31% in the large-area cell.
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