Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 39, Pages 20615-20622Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta06900f
Keywords
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Funding
- National Research Foundation of Korea (NRF) under Ministry of Science, ICT & Future Planning
- Ministry of Education [2014R1A5A1009799, 2009-0093826, 2015M1A2A2055631, 2012M3A6A7054855]
- Ministry of Trade, Industry & Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20163010012470]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20163010012470] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0093826, 2014R1A5A1009799, 2012M3A6A7054855, 21A20131812182] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Highly efficient and thermally stable inverted CH3NH3PbI3 (MAPbI(3)) and HC(NH2)(2)PbI3-xBrx (FAPbI(3-x)Br(x)) perovskite planar solar cells are demonstrated by using a N, N '-bis(phenylmethyl) naphthalene1,4,5,8- tetracarboxylic diimide (NDI-PM)-based electron transporting material (ETM) instead of a conventional fullerene-based phenyl-C-61-butyric acid methyl ester (PCBM) ETM. The MAPbI(3) and FAPbI(3-x)Br(x) devices with the NDI-PM-based ETM exhibit 18.4% and 19.6% power conversion efficiency under an illumination of 1 Sun (100 mW cm(-2)), respectively, which are comparable to the efficiency of PCBM ETM-based ones (18.9% and 20.0%). The improved thermal stability of NDI-based perovskite solar cells is attributed to much stronger hydrogen bonds in the NDI-PM molecular crystals than the PCBM crystals.
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