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Premium Perovskite Granular Wire Photodetectors with Ultrahigh Photodetectivity
Lee Yoon Ho,
Song Inho,
Kim Su Hwan,
Park Ju Hyun,
Park Sung O,
Lee Jeong Hun,
Won Yousang,
Cho Kilwon,
Kwak Sang Kyu,
Oh Joon Hak
Publication year2020
Publication title
advanced materials
Resource typeJournals
Abstract Control over the morphology and crystallinity of metal halide perovskite materials is of key importance to enable high‐performance optoelectronics. Here, a simple yet effective template‐free self‐assembly synthesis of perovskite granular wires with ultrahigh photodetectivity (3.17 × 10 15 Jones) is reported. The 1D self‐assembly of perovskite grains is driven by differences in the surface interaction energies of the granular facets. The superb photodetecting performance originates from extremely low dark current engendered by energetic barriers featuring unique band‐edge modulation along the long axis of wire. Flexible photodetector arrays, fabricated by selectively placing perovskite granular wires onto pre‐patterned electrode arrays on a transparent polymer substrate, show independently addressable photonic signal mapping with remarkably high detectivity, photoconductive gain, and responsivity. The “self‐assembled nanograin engineering” strategy developed in this study provides a viable method for the development of high‐performance perovskite photodetectors and can be extended to other integrated optoelectronic systems.
Subject(s)chemical engineering , chemistry , composite material , crystallinity , dark current , electrode , engineering , geology , materials science , nanotechnology , oceanography , optoelectronics , perovskite (structure) , photoconductivity , photodetector , responsivity , specific detectivity , substrate (aquarium)
SCImago Journal Rank10.707

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