CsPbBr<sub>3</sub> perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication

Konthoujam James Singh; Xiaotong Fan; Annada Sankar Sadhu; Chun-Ho Lin; Fang-Jyun Liou; Tingzhu Wu; Yu-Jung Lu; Jr-Hau He; Zhong Chen; Tom Wu; Hao-Chung Kuo

doi:10.1364/PRJ.434270

Photonics Research, Volume. 9, Issue 12, 2341(2021)

CsPbBr₃ perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication Editors' Pick

Konthoujam James Singh^1,2, Xiaotong Fan³, Annada Sankar Sadhu^1,2, Chun-Ho Lin⁴, Fang-Jyun Liou¹, Tingzhu Wu^3,7、*, Yu-Jung Lu⁵, Jr-Hau He⁶, Zhong Chen³, Tom Wu⁴, and Hao-Chung Kuo^1,8、*

Author Affiliations

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

²International Ph.D. Program in Photonics (UST), College of Electrical and Computer Engineering, Taiwan Yang Ming Chiao Tung University, Hsinchu 30010, China

³Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China

⁴School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia

⁵Research Center for Applied Sciences, Academia Sinica, Taipei 11529, China

⁶Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, China

⁷e-mail: wutingzhu@xmu.edu.cn

⁸e-mail: hckuo@faculty.nctu.edu.tw

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Figures & Tables(9)

Fig. 1. (a) Schematic of semipolar micro-LED structure; (b) optical microscopy image of micro-LED.

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Fig. 2. Fabrication of white-light system.

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Fig. 3. (a) XRD patterns, (b) TEM images; inset: ×5,000,000 resolution, and (c) PL and UV absorption spectra of the PQD paper.

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Fig. 4. (a) L–I–V characteristics of semipolar micro-LED; (b) EL spectra of semipolar micro-LED with increasing injection current; (c) peak wavelengths of c-plane and semipolar micro-LEDs for 1−1200 A/cm2 current density; (d) TRPL curves for semipolar micro-LED and PQD and CdSe QD papers.

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Fig. 5. (a) White-light spectrum generated using semipolar micro-LED and PQD and CdSe QD papers. Inset: photograph of flexible white-light system. (b) Color gamut of white-light system according to CIE 1931 color space under various current densities.

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Fig. 6. Schematic of experimental setup for VLC bandwidth measurement.

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Fig. 7. (a) Frequency responses for semipolar blue micro-LED; inset: eye diagram. (b) Comparison of bandwidth of PQD paper in nanostructure with that of PQD film; inset: eye diagram for PQD paper.

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Fig. 8. Benchmark of 3 dB bandwidth for QDs with applied current.

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Table 1. Overview of Reported QDs for VLC

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Table 1. Overview of Reported QDs for VLC

Materials Type	Decay Lifetime (τ)	Bandwidth	Data Rate	References
${CsPbBr}_{3}$ PQDs paper	5.92 ns	229 MHz	400 Mbps	This work
${CsPbBr}_{3}$ nanocrystals	5.93 ns	180 MHz	185 Mbps	[26]
${CsPbBr}_{1.8} I_{1.2}$ PQDs	43.74 ns	70 MHz	150 Mbps	[23]
${CsPbBr}_{3}$ PQDs in ${CsPb}_{4} {Br}_{6}$ matrix	–	24.6 MHz	364 Mbps	[39]
${AgInS}_{2} / ZnS$ QDs	77 ns	5.4 MHz	–	[40]
CdSe/ZnS QDs	17.24 ns	23.1 MHz	–	[41]
${CsPbBr}_{3}$ -in- ${Cs}_{4} {PbBr}_{6}$ QDs	7 ns	41 MHz	380 Mbps	[42]
CdSe/ZnS QDs	26.31 ns	2.70 MHz	–	[15]

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Konthoujam James Singh, Xiaotong Fan, Annada Sankar Sadhu, Chun-Ho Lin, Fang-Jyun Liou, Tingzhu Wu, Yu-Jung Lu, Jr-Hau He, Zhong Chen, Tom Wu, Hao-Chung Kuo, "CsPbBr₃ perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication," Photonics Res. 9, 2341 (2021)

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Paper Information

Category: Optoelectronics

Received: Jun. 15, 2021

Accepted: Sep. 6, 2021

Published Online: Nov. 5, 2021

The Author Email: Tingzhu Wu (wutingzhu@xmu.edu.cn), Hao-Chung Kuo (hckuo@faculty.nctu.edu.tw)

DOI:10.1364/PRJ.434270

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology