Brightened Bicomponent Perovskite Nanocomposite Based on Förster Resonance Energy Transfer for Micro-LED Displays

Xiaotong Fan; Shuli Wang; Xiao Yang; Chenming Zhong; Guolong Chen; Changzhi Yu; Yihang Chen; Tingzhu Wu; Hao-Chung Kuo; Yue Lin; Zhong Chen

doi:10.1002/adma.202300834

Brightened Bicomponent Perovskite Nanocomposite Based on Förster Resonance Energy Transfer for Micro-LED Displays

Adv Mater. 2023 Jul;35(30):e2300834. doi: 10.1002/adma.202300834. Epub 2023 Jun 6.

Authors

Xiaotong Fan^{1

2}, Shuli Wang^{1

2}, Xiao Yang^{1

2

3}, Chenming Zhong^{1

2}, Guolong Chen^{1

2}, Changzhi Yu^{1

2}, Yihang Chen^{1

2}, Tingzhu Wu^{1

2

4}, Hao-Chung Kuo⁵, Yue Lin^{1

2

4}, Zhong Chen^{1

2

3

4}

Affiliations

¹ Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, Fujian, China.
² State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005, Fujian, China.
³ Institute of Electromagnetics and Acoustics, School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, Fujian, China.
⁴ Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, Fujian, China.
⁵ Department of Photonics & Graduate Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering National Chiao Tung University, National Chiao Tung University, Hsinchu 30010, Taiwan, China.

PMID: 37080636
DOI: 10.1002/adma.202300834

Abstract

Lead halide perovskite quantum dots (PQDs) are making their way toward next-generation display applications, such as serving as color conversion layers in micro-light-emitting-diode (micro-LED) arrays. Red PQDs containing iodine exhibit weaker brightness compared with their green counterpart when employed as color conversion layers. Therefore, PQDs with enhanced brightness are highly favorable for micro/mini-LED displays. A universal strategy of bicomponent perovskite nanocomposite (BPNC) with significantly enhanced photoluminescence (PL) intensity is proposed through the built-in Förster resonance energy transfer (FRET) from the core CsPbBr₃ to the shell γ-CsPbI₃ , and it is confirmed that it is through a pair of combined quasi-degenerate energy levels in the blue spectra region that the FRET is conducted, resulting in a high excitation wavelength selectivity. Owing to the highly efficient energy transition route from blue excitation to red emission established by the FRET, the BPNC exhibits the brightest single-peak red photoluminescence with near 100% quantum yield. The BPNC with FRET is further proven to be adaptable to a wide range of emission wavelengths. The BPNCs in a blue micro-LED array are employed as color downconversion layers, and excellent color conversion properties and high color gamut are demonstrated. This strategy of BPNC paves a road to the full-color micro-LED displays.

Keywords: Förster resonance energy transfer; lead halide perovskites; micro-LED displays; quantum dots.

Abstract

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