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Preparation and Performance Studying of the Bi2S3Sensitized TiO2Quantum Dot Solar Cell

Author: XiangFaWu
Tutor: GaoYiHua
School: Huazhong University of Science and Technology
Course: Condensed Matter Physics
Keywords: Quantum Dot-sensitized solar cell photoelectrochemistry Bi2S3 annealed ZnS
CLC: TM914.4
Type: Master's thesis
Year: 2012
Downloads: 35
Quote: 0
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Abstract


As one of new source,solar cells have reached much attention nowadays for itscleanness low cost，and endlessness. In this paper，we accounted the rationale、structure、problem of the Quantum Dot-sensitized solar cell.We prepared solar cells using Bi2S3to sensitized TiO2,and done some performance optimization working.As a kind of cheap and safe semiconductor material，TiO2has been extensivelyinvestigated in the filed of solar cells．But it can’t absorb the solar effectively for its wideband—gap．One way to solve this problem is to use arrow band—gap semiconductormaterial to sensitize it．As non-toxic compound, Bi2S3with the band-gap of1.3ev and highabsorption coefficient on the order of105cm-1is a typical semiconductor material tosensitize TiO2electroders.Three main parts were involved in the study：in-situ growth of Bi2S3onto thenanoporous TiO2films. Testing of the photoelectrochemistry of the photoelectrodes foundthat the increasing of deposition cycles,the amount of light absorptions increased,but therecombination of the electron-hole pairs becomed more serious,which resulted thephotocurrent density and the power conversion efficiency increased first but then reduced.Exploring the performance changement of the annealed and the ZnS treated solarcell.We found that the performance of the cell become better after annealed and the ZnStreated respectively.Use solid-state CuSCN as electrolyte and TiO2nanorod arrays to assemble solar cell.forstudying optical and electrical properties.This paper include the synthesis of the materials、assembling of the solar cell and theperformance of the cell.We also the reason of some phenomenon.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
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