高解析度之二微米紅綠雙色量子點顏色轉換層

Abstract

在現今科技發達的時代中，量子點成為傳統顯示器能夠改善其缺點的關鍵，對於LCD而言，量子點的加入使其顏色純度變高且色域更加寬廣。而OLED在加入量子點後，則能使製程簡化，並且改善燒屏的問題，使OLED使用壽命增加。 此篇文章製作了InP紅色量子點顏色轉換層以及紅綠雙色量子點顏色轉換層，然後以積分球做量測。在InP部分中，我們將蝕刻深度推進至6.5微米且色彩轉換效率最高達到52%，加上d1r2後更是增強了1.266倍。 而紅綠雙色量子點顏色轉換層，是由兩個SU-8為基底且畫素大小2微米、間隔3微米的紅綠單色量子點顏色轉換層鍵合而成的，解析度為5080PPI。紅綠兩色的色彩轉換效率分別為11.2%與3.68%，並加入三種DBR量測各別光譜所增強的倍率大小。最後量測紅綠雙色量子點顏色轉換層上下層的光譜差異，發現在上層時的強度明顯較弱。

In today’s era of advanced technology, quantum dots have become a key solution for improving the limitations of traditional displays. For LCDs, the integration of quantum dots enhances color purity and significantly broadens the color gamut. In the case of OLEDs, quantum dots help simplify the fabrication process while also mitigating burn-in issues, thereby extending the operational lifetime of OLED devices. In this study, we fabricated an InP-based red quantum dot color conversion layer (CCL) and a dual-color red-green quantum dot CCL, and conducted measurements using an integrating sphere. For the InP CCL, we achieved an etching depth of 6.5 μm and a maximum color conversion efficiency (CCE) of 52%. With the addition of d1r2, the red emission was further enhanced by a factor of 1.266. The red-green bicolor CCL was constructed by bonding two SU-8-based monochromatic CCLs—each with a pixel size of 2 μm and a spacing of 3 μm—resulting in a resolution of 5080 PPI. The measured CCEs for the red and green QDs were 11.2% and 3.68%, respectively. Additionally, three types of distributed Bragg reflectors (DBRs) were incorporated to evaluate the enhancement factors for each corresponding spectrum. Finally, we measured the spectral differences between the top and bottom layers of the bicolor CCL, revealing that the top-layer emission was noticeably weaker.