Premium
A 1300 mm 2 Ultrahigh‐Performance Digital Imaging Assembly using High‐Quality Perovskite Single Crystals
Author(s) -
Liu Yucheng,
Zhang Yunxia,
Zhao Kui,
Yang Zhou,
Feng Jiangshan,
Zhang Xu,
Wang Kang,
Meng Lina,
Ye Haochen,
Liu Ming,
Liu Shengzhong Frank
Publication year - 2018
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.201707314
Subject(s) - materials science , wafer , perovskite (structure) , nucleation , optoelectronics , crystal (programming language) , thin film , crystallization , silicon , photodetector , single crystal , carrier lifetime , x ray detector , detector , optics , nanotechnology , crystallography , computer science , chemistry , organic chemistry , programming language , physics
By fine‐tuning the crystal nucleation and growth process, a low‐temperature‐gradient crystallization method is developed to fabricate high‐quality perovskite CH 3 NH 3 PbBr 3 single crystals with high carrier mobility of 81 ± 5 cm 2 V −1 s −1 (>3 times larger than their thin film counterpart), long carrier lifetime of 899 ± 127 ns (>5 times larger than their thin film counterpart), and ultralow trap state density of 6.2 ± 2.7 × 10 9 cm −3 (even four orders of magnitude lower than that of single‐crystalline silicon wafers). In fact, they are better than perovskite single crystals reported in prior work: their application in photosensors gives superior detectivity as high as 6 × 10 13 Jones, ≈10–100 times better than commercial sensors made of silicon and InGaAs. Meanwhile, the response speed is as fast as 40 µs, ≈3 orders of magnitude faster than their thin film devices. A large‐area (≈1300 mm 2 ) imaging assembly composed of a 729‐pixel sensor array is further designed and constructed, showing excellent imaging capability thanks to its superior quality and uniformity. This opens a new possibility to use the high‐quality perovskite single‐crystal‐based devices for more advanced imaging sensors.