Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot

White LEDs were encapsulated using Cs4PbBr6 quantum dots and Gd2O3:Eu red phosphor as lamp powder. Under the excitation of a GaN chip, the color coordinates of the W-LED were (0.33, 0.34), and the color tempe...

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Autores principales:	Shiyu Ma, Yan Lu, Bo Wang, Jinkai Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Cs–Pb–Br-based QDs Gd<sub>2</sub>O<sub>3</sub> Eu red phosphor electric current stability PLD technology Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/e15ee964e09c4ac888059d1154e15905
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spelling	oai:doaj.org-article:e15ee964e09c4ac888059d1154e159052021-11-11T18:12:51ZStudy of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot10.3390/ma142167161996-1944https://doaj.org/article/e15ee964e09c4ac888059d1154e159052021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6716https://doaj.org/toc/1996-1944White LEDs were encapsulated using Cs<sub>4</sub>PbBr<sub>6</sub> quantum dots and Gd<sub>2</sub>O<sub>3</sub>:Eu red phosphor as lamp powder. Under the excitation of a GaN chip, the color coordinates of the W-LED were (0.33, 0.34), and the color temperature was 5752 K, which is close to the color coordinate and color temperature range of standard sunlight. The electric current stability was excellent with an increase in the electric current, voltage, and luminescence intensity of the quantum dots and phosphors by more than 10 times. However, the stability of the quantum dots was slightly insufficient over long working periods. The photocatalytic devices were constructed using TiO<sub>2</sub>, CsPbBr<sub>3</sub>, and NiO as an electron transport layer, light absorption layer, and catalyst, respectively. The Cs–Pb–Br-based perovskite quantum dot photocatalytic devices were constructed using a two-step spin coating method, one-step spin coating method, and full PLD technology. In order to improve the water stability of the device, a hydrophobic carbon paste and carbon film were selected as the hole transport layer. The TiO<sub>2</sub> layer and perovskite layer with different thicknesses and film forming qualities were obtained by changing the spin coating speed. The influence of the spin coating speed on the device’s performance was explored through SEM and a J–V curve to find the best spin coating process. The device constructed by the two-step spin coating method had a higher current density but no obvious increase in the current density under light, while the other two methods could obtain a more obvious light response, but the current density was very low.Shiyu MaYan LuBo WangJinkai LiMDPI AGarticleCs–Pb–Br-based QDsGd<sub>2</sub>O<sub>3</sub>Eu red phosphorelectric current stabilityPLD technologyTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6716, p 6716 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cs–Pb–Br-based QDs Gd<sub>2</sub>O<sub>3</sub> Eu red phosphor electric current stability PLD technology Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	Cs–Pb–Br-based QDs Gd<sub>2</sub>O<sub>3</sub> Eu red phosphor electric current stability PLD technology Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Shiyu Ma Yan Lu Bo Wang Jinkai Li Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
description	White LEDs were encapsulated using Cs<sub>4</sub>PbBr<sub>6</sub> quantum dots and Gd<sub>2</sub>O<sub>3</sub>:Eu red phosphor as lamp powder. Under the excitation of a GaN chip, the color coordinates of the W-LED were (0.33, 0.34), and the color temperature was 5752 K, which is close to the color coordinate and color temperature range of standard sunlight. The electric current stability was excellent with an increase in the electric current, voltage, and luminescence intensity of the quantum dots and phosphors by more than 10 times. However, the stability of the quantum dots was slightly insufficient over long working periods. The photocatalytic devices were constructed using TiO<sub>2</sub>, CsPbBr<sub>3</sub>, and NiO as an electron transport layer, light absorption layer, and catalyst, respectively. The Cs–Pb–Br-based perovskite quantum dot photocatalytic devices were constructed using a two-step spin coating method, one-step spin coating method, and full PLD technology. In order to improve the water stability of the device, a hydrophobic carbon paste and carbon film were selected as the hole transport layer. The TiO<sub>2</sub> layer and perovskite layer with different thicknesses and film forming qualities were obtained by changing the spin coating speed. The influence of the spin coating speed on the device’s performance was explored through SEM and a J–V curve to find the best spin coating process. The device constructed by the two-step spin coating method had a higher current density but no obvious increase in the current density under light, while the other two methods could obtain a more obvious light response, but the current density was very low.
format	article
author	Shiyu Ma Yan Lu Bo Wang Jinkai Li
author_facet	Shiyu Ma Yan Lu Bo Wang Jinkai Li
author_sort	Shiyu Ma
title	Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
title_short	Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
title_full	Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
title_fullStr	Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
title_full_unstemmed	Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot
title_sort	study of construction and performance on photoelectric devices of cs–pb–br perovskite quantum dot
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e15ee964e09c4ac888059d1154e15905
work_keys_str_mv	AT shiyuma studyofconstructionandperformanceonphotoelectricdevicesofcspbbrperovskitequantumdot AT yanlu studyofconstructionandperformanceonphotoelectricdevicesofcspbbrperovskitequantumdot AT bowang studyofconstructionandperformanceonphotoelectricdevicesofcspbbrperovskitequantumdot AT jinkaili studyofconstructionandperformanceonphotoelectricdevicesofcspbbrperovskitequantumdot
_version_	1718431915932909568

Study of Construction and Performance on Photoelectric Devices of Cs–Pb–Br Perovskite Quantum Dot

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