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Controlled Growth of Monocrystalline Organo‐Lead Halide Perovskite and Its Application in Photonic Devices
Author(s) -
Mao Wenxin,
Zheng Jialu,
Zhang Yupeng,
Chesman Anthony S. R.,
Ou Qingdong,
Hicks Jamie,
Li Feng,
Wang Ziyu,
Graystone Brenton,
Bell Toby D. M.,
Rothmann Mathias Uller,
Duffy Noel W.,
Spiccia Leone,
Cheng YiBing,
Bao Qiaoliang,
Bach Udo
Publication year - 2017
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.201703786
Subject(s) - halide , monocrystalline silicon , optoelectronics , materials science , photonics , perovskite (structure) , diode , light emitting diode , nanotechnology , optics , silicon , chemistry , inorganic chemistry , physics , crystallography
Organo‐lead halide perovskites (OHPs) have recently emerged as a new class of exceptional optoelectronic materials, which may find use in many applications, including solar cells, light emitting diodes, and photodetectors. More complex applications, such as lasers and electro‐optic modulators, require the use of monocrystalline perovskite materials to reach their ultimate performance levels. Conventional methods for forming single crystals of OHPs like methylammonium lead bromide (MAPbBr 3 ) afford limited control over the product morphology, rendering the assembly of defined microcavity nanostructures difficult. We overcame this by synthesizing for the first time (MA)[PbBr 3 ]⋅DMF ( 1 ), and demonstrating its facile transformation into monocrystalline MAPbBr 3 microplatelets. The MAPbBr 3 microplatelets were tailored into waveguide based photonic devices, of which an ultra‐low propagation loss of 0.04 dB μm −1 for a propagation distance of 100 μm was demonstrated. An efficient active electro‐optical modulator (AEOM) consisting of a MAPbBr 3 non‐linear arc waveguide was demonstrated, exhibiting a 98.4 % PL intensity modulation with an external voltage of 45 V. This novel synthetic approach, as well as the demonstration of effective waveguiding, will pave the way for developing a wide range of photonic devices based on organo‐lead halide perovskites.