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Effect of Excess PbI 2 in Fully Printable Carbon‐based Perovskite Solar Cells
Author(s) -
Kapoor Vishakha,
Bashir Amna,
Haur Lew J.,
Bruno Annalisa,
Shukla Sudhanshu,
Priyadarshi Anish,
Mathews Nripan,
Mhaisalkar Subodh
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700484
Subject(s) - iodide , energy conversion efficiency , perovskite (structure) , materials science , chemical engineering , amine gas treating , open circuit voltage , degradation (telecommunications) , solar cell , carbon fibers , inorganic chemistry , chemistry , voltage , organic chemistry , optoelectronics , composite material , telecommunications , physics , quantum mechanics , composite number , computer science , engineering
Excess lead iodide (PbI 2 ) has been reported to improve the power conversion efficiency (PCE) in the standard perovskite solar cell (PSC) with 2,2,7,7‐Tetrakis( N , N ‐di‐ p ‐methoxyphenyl‐amine)‐9,9‐ spirobifluorene (spiro‐OMeTAD) as a hole‐transporting material. In this study, we studied the effect of having excess PbI 2 in fully printable carbon‐based perovskite solar cells (PSC). Excess amounts of PbI 2 , ranging from 0 % to 15 %, were added to the equimolar perovskite solution for infiltration in the carbon‐based PSC architecture. There was an improvement in the average value of open‐circuit voltage (0.87 to 0.91 V) with increased PbI 2 , but there was no clear trend in fill factor and current density. All devices showed good stability under ambient conditions without encapsulation. The device containing 15 % excess PbI 2 showed degradation under continuous illumination, whereas there was no degradation with an equimolar ratio of perovskite precursors.