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WO 3 ‐Based Electrochromic Distributed Bragg Reflector: Toward Electrically Tunable Microcavity Luminescent Device
Author(s) -
Xiao Lili,
Lv Ying,
Lin Jie,
Hu Yongsheng,
Dong Wenjie,
Guo Xiaoyang,
Fan Yi,
Zhang Nan,
Zhao Jialong,
Wang Yunjun,
Liu Xingyuan
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201700791
Subject(s) - materials science , optoelectronics , distributed bragg reflector , electroluminescence , luminescence , photoluminescence , lasing threshold , electrochromism , optics , wavelength , layer (electronics) , nanotechnology , electrode , chemistry , physics
The electroresponsive WO 3 ‐based electrochromic distributed Bragg reflectors (ECDBRs) are fabricated by means of one‐step, room temperature glancing‐angle electron‐beam evaporation. The reflectance and Bragg wavelength of ECDBRs can be precisely and reversibly tailored on a large scale by simply applying a small bias voltage (±1.1 V) due to the electrochromic effect of the WO 3 layer, and this unique character is utilized to construct an electrically tunable microcavity luminescent device with embedded green CdSe@ZnS quantum dots (QDs). Therefore, large and reversible modulation in terms of photoluminescence (PL) peak intensity (18–335%), PL peak position (from 510.3 to 525.8 nm), and full width at half maximum (from 21.8 to 11.4 nm) from QDs in microcavity are achieved under electrical stimulus. The results will potentially provide a straightforward voltage‐control route toward broadband tunable microcavity electroluminescent and lasing devices.