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Perovskite hybrid solar cell based on cadmium sulfide nanoarray

A nano-array and solar cell technology, applied in the field of solar cells, can solve problems such as departing from the original intention of solar cells, and achieve the effects of large-area preparation, simple process, and cost reduction

Inactive Publication Date: 2014-09-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the above-mentioned metal oxides generally need to be sintered at high temperature to ensure their good crystallinity and good electron transport ability, but the high-temperature sintering process undoubtedly deviates from the original intention of solution-processable solar cells

Method used

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  • Perovskite hybrid solar cell based on cadmium sulfide nanoarray
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  • Perovskite hybrid solar cell based on cadmium sulfide nanoarray

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The glass substrate covered with indium tin oxide was ultrasonically washed with detergent, isopropanol, ethanol and acetone for 5 minutes, rinsed with deionized water and dried. CdS nanorod arrays were grown on the substrate by the sol-gel method, and the array height was 100 nm. After UV-ozone treatment, the CH with a thickness of 400 nm was prepared by solution spin coating. 3 NH 3 PB 3 The photosensitive layer is baked at 100°C for 15 minutes. in CH 3 NH 3 PB 3 2,2',7,7'-Tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene A mixture of (spiro-MeOTAD), bis(trifluoromethylsulfonyl)lithium (Li-TFSI) and 4-tert-butylpyridine (TBP) at a molar ratio of 2.5:1:3 was used as a hole transport layer. Finally, a silver electrode with a thickness of 10 nm was prepared by vacuum evaporation. From image 3 It can be seen in the figure that the nanorods grow perpendicular to the ITO surface, with a length of about 400nm and a diameter of about 100nm. Such as fig...

Embodiment 2

[0037] The glass substrate covered with fluorine-doped tin oxide was ultrasonically washed with detergent, isopropanol, ethanol and acetone for 5 minutes, rinsed with deionized water and dried. CdS nanowire arrays were grown on the substrate by the hydrothermal method, and the array height was 1000nm. After air heat treatment, CH with a thickness of 500nm was prepared by single-source vapor deposition. 3 NH 3 PbBr 3 The photosensitive layer is baked at 120° C. for 5 minutes. in CH 3 NH 3 PbBr 3 2,2',7,7'-Tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene (spiro-MeOTAD), a mixture of bis(trifluoromethylsulfonyl)lithium (Li-TFSI) and 4-tert-butylpyridine (TBP) at a molar ratio of 2.5:1:3 as a hole transport layer. Finally, a 300 nm thick aluminum electrode was vacuum evaporated. Such as figure 2 As shown, the absorption spectrum of CdS nanoarrays to sunlight is wider than that of ZrO 2. As mentioned above, get as figure 1 The perovskite hybrid solar cell s...

Embodiment 3

[0039] The quartz substrate covered with fluorine-doped tin oxide was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 10 minutes, rinsed with deionized water and dried. The CdS nanotube array was grown on the substrate by electrochemical method, the array height was 500nm, after air heat treatment, the CH with a thickness of 30nm was prepared by dual-source vapor deposition method 3 NH 3 PBr 2 The photosensitive layer is baked at 140° C. for 10 minutes. in CH 3 NH 3 PBr 2 2,2',7,7'-Tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene (spiro-MeOTAD), a mixture of bis(trifluoromethylsulfonyl)lithium (Li-TFSI) and 4-tert-butylpyridine (TBP) at a molar ratio of 2.5:1:3 as a hole transport layer. Finally, a 200nm thick magnesium electrode was prepared by vacuum evaporation. Such as figure 2 As shown, the absorption spectrum of CdS nanoarrays to sunlight is wider than that of TiO 2 . As mentioned above, get as figure 1 The perovskite ...

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Abstract

The invention discloses a perovskite hybrid solar cell based on a cadmium sulfide nanoarray. The perovskite hybrid solar cell comprises a substrate, a transparent metal electrode layer, an inorganic electron transport layer, a photosensitive layer, a hole transport layer and a metal electrode layer; the transparent metal electrode layer, the inorganic electron transport layer, the photosensitive layer, the hole transport layer and the metal electrode layer are orderly arranged on the substrate from bottom to top; the inorganic electron transport layer is formed from the cadmium sulfide nanoarray; the form of the cadmium sulfide nanoarray is nanorod, nanowire or nanotube. The perovskite hybrid solar cell is characterized in that the cadmium sulfide nanoarray is taken as the electron transport layer material instead of high-temperature sintered metal oxides widely used at present, and has relatively small band gap width and is relatively wide in an absorption spectrum to sunlight; the interface area of the electron transport layer material and the material of the photosensitive layer is increased and a continuous electron transport channel is provided; compared with high temperature sintering, the perovskite hybrid solar cell has the advantages of low cost, low energy consumption and easily realizable large-area preparation.

Description

technical field [0001] The invention relates to a solar cell, in particular to a perovskite hybrid solar cell based on a cadmium sulfide nano array. Background technique [0002] Solar cells can convert the widely available and non-polluting solar energy into electrical energy, and are a hot spot of concern and research in academia and industry. Inorganic solar cells are currently the most mature varieties of all solar cells, with relatively high photoelectric conversion efficiency, but high energy consumption and pollution in the manufacturing process, on the one hand, increase the cost of battery products, on the other hand, it also affects the environment. And society brings extra stress. [0003] However, currently used electron transport layer materials are limited to metal oxides, including TiO 2 , ZnO, ZrO 2 . These materials are wide-bandgap inorganic semiconductors, and the cut-off band edges of their absorption spectra are all less than 400nm, and cannot absorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46B82Y30/00B82Y40/00
CPCY02E10/549B82Y30/00B82Y40/00H10K30/352H10K2102/00
Inventor 陈红征吴刚顾卓韦陈飞傅伟飞汪茫
Owner ZHEJIANG UNIV
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