標題: Tuning the Color Temperature of White-Light-Emitting Electrochemical Cells by Laser-Scanning Perovskite-Nanocrystal Color Conversion Layers
作者: Wu, Wen-Kuang
Wang, Cheng-Ming
Chan, Ming-Che
Lien, Jiun-Yi
Su, Yong-Ming
Sarma, Monima
Yang, Zu-Po
Su, Hai-Ching
Wong, Ken-Tsung
Wang, Sue-Lein
光電系統研究所
照明與能源光電研究所
Institute of Photonic System
Institute of Lighting and Energy Photonics
關鍵字: color temperature;light-emitting electrochemical cells;nanocrystals;perovskites
公開日期: 1-Apr-2018
摘要: The development of white-light-emitting electrochemical cells (LECs) has attracted great attention owing to their numerous advantages. Recently, perovskite materials have also shown many outstanding optoelectronic properties in light absorption and emission, and hence they are suitable for serving as the color conversion layers (CCLs) in solid-state white-light-emitting diodes (LEDs). Here, white LECs were fabricated by integrating non-doped blue-green LECs with CCLs made of a single composition of perovskite nanocrystal (NCs). Moreover, the correlated color temperatures (CCTs) of the white LECs can be tuned by modifying the optical properties of the perovskite NCs, in the same way as so as the color conversion properties of CCLs are tuned, through laser scan. By controlling the laser power, scanning number, and duty cycle of the scanned grating patterns on perovskite-NC CCLs, the CCTs of the white LECs can be tuned from 2502 K to nearly 4300 K. Since this method is much different from that used with conventional CCLs, which use multiple compositions of perovskite NCs to produce white light, the inherent anion-exchange issue of perovskite NCs can be avoided.
URI: http://dx.doi.org/10.1002/cplu.201700422
http://hdl.handle.net/11536/144860
ISSN: 2192-6506
DOI: 10.1002/cplu.201700422
期刊: CHEMPLUSCHEM
Volume: 83
起始頁: 239
結束頁: 245
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