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Passivation Using Molecular Halides Increases Quantum Dot Solar Cell Performance
Author(s) -
Lan Xinzheng,
Voznyy Oleksandr,
Kiani Amirreza,
García de Arquer F. Pelayo,
Abbas Abdullah Saud,
Kim GiHwan,
Liu Mengxia,
Yang Zhenyu,
Walters Grant,
Xu Jixian,
Yuan Mingjian,
Ning Zhijun,
Fan Fengjia,
Kanjanaboos Pongsakorn,
Kramer Illan,
Zhitomirsky David,
Lee Philip,
Perelgut Alexander,
Hoogland Sjoerd,
Sargent Edward H.
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201503657
Subject(s) - passivation , materials science , quantum dot , solar cell , quantum dot solar cell , optoelectronics , halide , energy conversion efficiency , nanotechnology , diffusion , colloid , polymer solar cell , chemical engineering , inorganic chemistry , chemistry , physics , layer (electronics) , thermodynamics , engineering
A solution‐based passivation scheme is developed featuring the use of molecular iodine and PbS colloidal quantum dots (CQDs). The improved passivation translates into a longer carrier diffusion length in the solid film. This allows thicker solar‐cell devices to be built while preserving efficient charge collection, leading to a certified power conversion efficiency of 9.9%, which is a new record in CQD solar cells.