논문 해외 국제전문학술지(SCI급) Efficient Quantum Dot Color Conversion Layer with Mixed Spherical/rod-shaped Scattering Particles
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2023-03
- 저자명 Hyunji Park, Donghyo Hahm, Hyunsu Cho, Jin-Wook Shin, Chan-mo Kang, Dae-Hyun Ahn, Chul Woong Joo, Byoung-Hwa Kwon, Kukjoo Kim, Joo Yeon Kim, Byeong Guk Jeong, Nam Sung Cho, Wan Ki Bae, Jonghee Lee*, Sukyung Choi
- 학술지명 ACS Applied Optical Materials
- 발행처명 ACS Publications
- 발행국가 해외
- 논문언어 한국어
홈페이지논문 초록 (Abstract)
A quantum dot (QD) color conversion layer (CCL) with mixed-shaped scattering nanoparticles exhibits enhanced light conversion and reduced blue leakage in QD-organic light-emitting diodes (OLEDs). In this study, nontoxic bright red QDs and spherical and rod-shaped zinc oxide (ZnO) nanoparticles were mixed in an ultraviolet-curable resin without aggregation. The mixture of spherical and rod-shaped ZnO nanoparticles enhanced the blue light scattering inside the QD CCL, which results in an increase of the blue absorption by the QDs and a dramatic improvement of the color conversion. Extraction of the converted red light was also attributed to the Mie scattering of the rod-shaped scattering nanoparticles. The QD CCL with 15 wt % mixed-shaped scattering particles showed seven times increase of red intensity and four times decrease of blue intensity compared to that without scattering particles. We fabricated direct coat-type QD-OLEDs and confirmed that the color conversion and output/input efficiencies were improved and the blue leakage was decreased with increasing number of QD CCLs. This method improves the color conversion efficiency without increasing the amount of QDs and reducing the blue leakage without using a color filter.