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Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells
Author(s) -
Guijarro Néstor,
Yao Liang,
Le Formal Florian,
Wells Rebekah A.,
Liu Yongpeng,
Darwich Barbara Primera,
Navratilova Lucie,
Cho HanHee,
Yum JunHo,
Sivula Kevin
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201906803
Subject(s) - materials science , perovskite (structure) , optoelectronics , energy conversion efficiency , photovoltaic system , halide , quantum dot , stack (abstract data type) , heterojunction , acceptor , absorption (acoustics) , photovoltaics , solar cell , nanotechnology , chemical engineering , chemistry , inorganic chemistry , computer science , electrical engineering , physics , engineering , composite material , programming language , condensed matter physics
The facile synthesis, solution‐processability, and outstanding optoelectronic properties of emerging colloidal lead halide perovskite quantum dots (LHP QDs) makes them ideal candidates for scalable and inexpensive optoelectronic applications, including photovoltaic (PV) devices. The first demonstration of integrating CsPbI 3 QDs into a conventional organic solar cell (OSC) involves embedding the LHP QDs in a donor–acceptor (PTB7‐Th:PC 71 BM) bulk heterojunction. Optimizing the loading amount at 3 wt %, we demonstrate a power conversion efficiency of 10.8 %, which is a 35 % increase over control devices, and is a record amongst hybrid ternary OSCs. Detailed investigation into the mechanisms behind the performance enhancement shows that increased light absorption is not a factor, but that increased exciton separation in the acceptor phase and reduced recombination are responsible.