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: | 1-四月-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 |
顯示於類別: | 期刊論文 |