81‐3: Distinguished Paper: Developing High Efficiency Heavy Metal Free QD‐LEDs for Next Generation Displays

• DOI: 10.1002/sdtp.13138
• Publication Date: 2019-05-29T12:21:07Z
• Authors: Christian Ippen; Wenzhuo Guo; Don Zehnder; Daekyoung Kim; Jesse Manders; Diego Barrera; Benjamin Newmeyer; Dylan Hamilton; Chunming (Kevin) ...; Charlie Hotz; Ruiqing Ma; Jong-Kwan Bin; ByungGeol Kim; KyuNam Kim; KyungKook Jang; Jaehyun Park; Taeyang Lee; Wy-Yong Kim; JounHo Lee
• Keywords: 02 engineering and technology; 0210 nano-technology

In this paper we report on our progress on developing heavy metal free (or Cd‐free) QD‐LEDs for all three colors. With improvement in synthesis we have developed high quantum yield heavy metal free QDs (>95% for Red and Green; >80% for Blue) with peak wavelengths suitable for BT.2020. Building upon these high performance QDs and through novel device structure design and optimization we have demonstrated high efficiency heavy metal free QD‐LEDs with EQE=16.9%, 13%, 9% for Red, Green, Blue, respectively.