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Flexible, Printable Soft‐X‐Ray Detectors Based on All‐Inorganic Perovskite Quantum Dots
Author(s) -
Liu Jingying,
Shabbir Babar,
Wang Chujie,
Wan Tao,
Ou Qingdong,
Yu Pei,
Tadich Anton,
Jiao Xuechen,
Chu Dewei,
Qi Dongchen,
Li Dabing,
Kan Ruifeng,
Huang Yamin,
Dong Yemin,
Jasieniak Jacek,
Zhang Yupeng,
Bao Qiaoliang
Publication year - 2019
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.201901644
Subject(s) - materials science , perovskite (structure) , photocurrent , fabrication , optoelectronics , quantum dot , x ray detector , halide , detector , photodetector , semiconductor , nanotechnology , photovoltaic system , optics , physics , medicine , inorganic chemistry , chemistry , alternative medicine , pathology , chemical engineering , engineering , ecology , biology
Metal halide perovskites represent a family of the most promising materials for fascinating photovoltaic and photodetector applications due to their unique optoelectronic properties and much needed simple and low‐cost fabrication process. The high atomic number ( Z ) of their constituents and significantly higher carrier mobility also make perovskite semiconductors suitable for the detection of ionizing radiation. By taking advantage of that, the direct detection of soft‐X‐ray‐induced photocurrent is demonstrated in both rigid and flexible detectors based on all‐inorganic halide perovskite quantum dots (QDs) synthesized via a solution process. Utilizing a synchrotron soft‐X‐ray beamline, high sensitivities of up to 1450 µC Gy air −1 cm −2 are achieved under an X‐ray dose rate of 0.0172 mGy air s −1 with only 0.1 V bias voltage, which is about 70‐fold more sensitive than conventional α‐Se devices. Furthermore, the perovskite film is printed homogeneously on various substrates by the inexpensive inkjet printing method to demonstrate large‐scale fabrication of arrays of multichannel detectors. These results suggest that the perovskite QDs are ideal candidates for the detection of soft X‐rays and for large‐area flat or flexible panels with tremendous application potential in multidimensional and different architectures imaging technologies.