利用雷射掃描直寫技術製作之鈣鈦礦量子點色彩轉換層調變白光有機發光電化學元件之色溫

Abstract

由於白光有機發光電化學元件有很大的優勢，所以其近期發展備受矚目，再加上近年來鈣鈦礦材料的崛起，它對於光吸收及放射有著傑出的光電特性，因此適合拿來當作有機發光元件的色彩轉換層。在此，本實驗將利用單一材料的鈣鈦礦量子點當作色彩轉換層，並結合未摻雜的藍綠光有機發光電化學元件組合出白光的有機發光電化學元件；除此之外，本實驗將藉由雷射掃描的方法去改變色彩轉換層上的光學特性，達到調變色溫的效果，而色溫的調變範圍可從2168K~7230K。相較於傳統透過混合多種顏色的鈣鈦礦量子點組成的色彩轉換層所產生的白光，本實驗的方法可以避免多種顏色鈣鈦礦之間離子交換的現象發生。

Development of white light-emitting electrochemical cells (LECs) has attracted great attention in consideration of their advantages. Recently, perovskite materials have also shown many outstanding optoelectronic properties of light absorption and emission, and hence are suitable for serving the color conversion layers (CCLs) of the solid-state white light emitting diodes (LEDs). Here, we fabricated the white LECs by integrating the non-doped blue-green LECs with the CCLs made by single composition of perovskite nanocrystal (NCs). Moreover, we proposed and demonstrated that the correlated color temperatures (CCTs) of the white LECs can be tuned through laser scan. The CCTs of the white LECs can be tuned from 2168 K to 7230 K. This method is much different from the conventional CCLs of using multiple compositions of perovskite NCs in CCLs to produce white light, so that it can avoid the inherent anion-exchange issue of perovskite NCs.