Synthesis of Sn-Doped CsPbBr<sub>3</sub> Quantum Dot and Research on Its Photoelectric Properties

Fanju Zeng; Yongqian Tan; Xiaomei Zhang; Haifeng Yin; Weiwei Chen; Xiaosheng Tang

doi:10.3788/AOS202141.0416001

Acta Optica Sinica, Volume. 41, Issue 4, 0416001(2021)

Synthesis of Sn-Doped CsPbBr₃ Quantum Dot and Research on Its Photoelectric Properties

Fanju Zeng^1,2、*, Yongqian Tan², Xiaomei Zhang², Haifeng Yin², Weiwei Chen¹, and Xiaosheng Tang^1、**

Author Affiliations

¹College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China

²School of Big Data Engineering, Kaili University, Kaili, Guizhou 556011, China

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Fig. 1. XRD patterns of CsPbBr₃ and Sn-doped CsPbBr₃ QDs

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Fig. 2. Absorption spectra and photoluminescence spectroscopy of CsPbBr₃ and Sn-doped CsPbBr₃ QDs. (a) Absorption spectra; (b) photoluminescence spectroscopy

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Fig. 3. Photoluminescence decay curves of CsPbBr₃ and Sn-doped CsPbBr₃ QDs

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Fig. 4. TEM images and particle size distributions. (a) TEM image of CsPbBr₃ QDs; (b) TEM image of CsPb_0.9Sn_0.1Br₃ QDs; (c) particle size distribution of CsPbBr₃ QDs; (d) particle size distribution of CsPb_0.9Sn_0.1Br₃ QDs

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Fig. 5. Photofluorogram of CsPb_0.9Sn_0.1Br₃ and CsPbBr₃ QDs under UV light irradiation (365 nm)

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Fig. 6. Schematic of Al/LiF/TPBi/QDs/PVK/PEDOT∶PSS/ITO quantum dot light emitting diodes vertical stack structure

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Fig. 7. Electroluminescence performance of QLED.(a) Electroluminescence spectra of Al/LiF/TPBi/CsPbBr₃/PVK/PEDOT∶PSS/ITO device at different voltages; (b) electroluminescence spectra of Al/LiF/TPBi/CsPb_0.9Sn_0.1Br₃/PVK/PEDOT∶PSS/ITO device at different voltages; (c) current density-voltage curves; (d) luminance-voltage curves

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Fig. 8. CIE coordinates of CsPbBr₃ QLED and Sn-doped CsPb_0.9Sn_0.1Br₃ QLED

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Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr₃ and Sn-doped CsPbBr₃ QDs

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Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr₃ and Sn-doped CsPbBr₃ QDs

QDs	A₁ /%	τ₁ /ns	A₂ /%	τ₂ /ns	A₃ /%	τ₃ /ns	τ_avg /ns	PLQY /%
CsPbBr₃	36.1	5.56	59.7	1.39	4.2	22.9	9.0	21.0
CsPb_0.9Sn_0.1Br₃	23.9	12.5	73.1	3.65	3.0	56.0	19.3	40.4
CsPb_0.8Sn_0.2Br₃	30.7	6.2	65.6	1.8	3.7	20.9	7.8	17.6
CsPb_0.6Sn_0.4Br₃	0.4	19.1	4.4	5.1	95.2	1.2	2.7	10.4

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Fanju Zeng, Yongqian Tan, Xiaomei Zhang, Haifeng Yin, Weiwei Chen, Xiaosheng Tang. Synthesis of Sn-Doped CsPbBr₃ Quantum Dot and Research on Its Photoelectric Properties[J]. Acta Optica Sinica, 2021, 41(4): 0416001

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Paper Information

Category: Materials

Received: Aug. 20, 2020

Accepted: Oct. 9, 2020

Published Online: Feb. 26, 2021

The Author Email: Zeng Fanju (zengfanju@cqu.edu.cn), Tang Xiaosheng (xstang@cqu.edu.cn)

DOI:10.3788/AOS202141.0416001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr3 and Sn-doped CsPbBr3 QDs

Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr3 and Sn-doped CsPbBr3 QDs

Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr₃ and Sn-doped CsPbBr₃ QDs

Table 1. Fitting results fitted by photoluminescence decay curves and PLQY of CsPbBr₃ and Sn-doped CsPbBr₃ QDs