Hybrid-type white LEDs based on inorganic halide perovskite QDs: candidates for wide color gamut display backlights

Chih-Hao Lin; Akta Verma; Chieh-Yu Kang; Yung-Min Pai; Tzu-Yu Chen; Jin-Jia Yang; Chin-Wei Sher; Ya-Zhu Yang; Po-Tsung Lee; Chien-Chung Lin; Yu-Chuan Wu; S. K. Sharma; Tingzhu Wu; Shu-Ru Chung; Hao-Chung Kuo

doi:10.1364/PRJ.7.000579

Journals >Photonics Research >Volume 7 >Issue 5 >Page 579 > Article

Photonics Research
Vol. 7, Issue 5, 579 (2019)

Hybrid-type white LEDs based on inorganic halide perovskite QDs: candidates for wide color gamut display backlights

Chih-Hao Lin¹, Akta Verma², Chieh-Yu Kang¹, Yung-Min Pai¹, Tzu-Yu Chen¹, Jin-Jia Yang¹, Chin-Wei Sher³, Ya-Zhu Yang⁴, Po-Tsung Lee¹, Chien-Chung Lin⁵, Yu-Chuan Wu^6、7, S. K. Sharma², Tingzhu Wu^8、9、*, Shu-Ru Chung^4、10、*, and Hao-Chung Kuo^1、11、*

Author Affiliations

¹Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, Taiwan Chiao Tung University, Hsinchu 30010, China

²Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India

³Fok Ying Tung Research Institute, Hong Kong University of Science and Technology, Hong Kong, China

⁴Department of Materials Science and Engineering, Taiwan Formosa University, Yunlin 63201, China

⁵Institute of Photonic System, College of Photonics, Taiwan Chiao Tung University, Tainan 711, China

⁶Department of Materials and Mineral Resources Engineering, Taiwan Taipei University of Technology, Taipei 10608, China

⁷Department of Chemical and Materials Engineering, Chinese Culture University, Taipei 11114, China

⁸Department of Electronic Science, Fujian Engineering Research Center for Solid-state Lighting, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen University, Xiamen 361005, China

⁹e-mail: wutingzhu@xmu.edu.cn

¹⁰e-mail: srchung@nfu.edu.tw

¹¹e-mail: hckuo@faculty.nctu.edu.tw

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DOI: 10.1364/PRJ.7.000579 Cite this Article Set citation alerts

Chih-Hao Lin, Akta Verma, Chieh-Yu Kang, Yung-Min Pai, Tzu-Yu Chen, Jin-Jia Yang, Chin-Wei Sher, Ya-Zhu Yang, Po-Tsung Lee, Chien-Chung Lin, Yu-Chuan Wu, S. K. Sharma, Tingzhu Wu, Shu-Ru Chung, Hao-Chung Kuo. Hybrid-type white LEDs based on inorganic halide perovskite QDs: candidates for wide color gamut display backlights[J]. Photonics Research, 2019, 7(5): 579 Copy Citation Text

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Abstract

We demonstrate inorganic halide perovskite quantum-dots-based white light-emitting diodes via three different geometries, including liquid, solid, and hybrid types. Problems of fast anion exchange and aggregation in the cases of liquid- and solid-type devices are discussed in detail and push us to move towards the fabrication of a hybrid-type device structure. The experiment results illustrate that a hybrid-type device has the highest luminance efficiency (51 lm/W) and a wide color gamut (122% of NTSC and 91% of Rec. 2020). Therefore, we conclude that a hybrid-type device can provide an outstanding color gamut for high color gamut display applications.