Wook Kang Tae, Lee Sol, Ji Park Young, Jin Jeong Gyu, Su Kim Jong, Bae Byungseo, Hwang Jonghee, Kim Sun Woog
Opt Lett. 2020 Sep 15;45(18):4972-4975. doi: 10.1364/OL.401058.
Green-emitting perovskite nanocrystals were synthesized by the modified hot-injection method using three different solvents. The produced nanocrystals showed a narrow green emission band centered at 515-520 nm with full width at half-maximum (FWHM) values of approximately 18-20 nm. The highest photoluminescence quantum yield (PLQY) was obtained for the nanocrystal sample synthesized using a paraffin liquid solvent, with a value of 70.1% under excitation at 450 nm. The nanocrystals film light-emitting diodes (LED) chip module showed a luminous efficacy of 40.7/. The white LED (WLED) with green and red nanocrystal films emitted bluish-white light with a high color rendering index of 89, and the luminous efficacy of the WLED reached 16.3/.
采用三种不同的溶剂，通过改进的热注入法合成了发射绿色光的钙钛矿纳米晶体。所制备的纳米晶体呈现出以515 - 520 nm为中心的窄绿色发射带，半高宽（FWHM）值约为18 - 20 nm。使用石蜡液体溶剂合成的纳米晶体样品获得了最高的光致发光量子产率（PLQY），在450 nm激发下其值为70.1%。纳米晶体薄膜发光二极管（LED）芯片模块的发光效率为40.7/。具有绿色和红色纳米晶体薄膜的白色发光二极管（WLED）发出蓝白色光，显色指数高达89，WLED的发光效率达到16.3/。
