Open AccessMultifaceted Excited State of CH3NH3PbI3. Charge Separation, Recombination, and Trapping
Author(s) -
Jeffrey A. Christians,
Joseph S. Manser,
Prashant V. Kamat
Publication year - 2015
Publication title -
the journal of physical chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.563
H-Index - 203
ISSN - 1948-7185
DOI - 10.1021/acs.jpclett.5b00594
Subject(s) - excited state , perovskite (structure) , photovoltaic system , charge (physics) , materials science , engineering physics , recombination , charge carrier , trapping , chemical physics , nanotechnology , optoelectronics , chemistry , atomic physics , physics , engineering , electrical engineering , ecology , biochemistry , quantum mechanics , biology , gene , crystallography
A need to understand the excited-state behavior of organic-inorganic hybrid perovskites, such as CH3NH3PbI3, has arisen due to the rapid development of perovskite solar cells. The photoinduced processes leading to the efficient charge separation observed in these materials remain somewhat elusive. This Perspective presents an overview of the initial attempts to characterize the excited-state and charge recombination dynamics in the prototypical material CH3NH3PbI3. While much has been accomplished in designing high-efficiency solar cells, the multifaceted nature of the CH3NH3PbI3 excited state offers ample challenges for the photovoltaic community to better comprehend. Building on this foundation may enable us to tackle the stability concerns that have shadowed the rise of perovskite solar cells. Furthermore, a better understanding of the excited-state properties can provide insight into the specific properties that have thrust this material to the forefront of photovoltaic research.
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