Evaluation of electrical and optical characteristics of ZnO/CdS/CIS thin film solar cell

doi:10.1088/1674-1056/25/2/027103

摘要/Abstract

摘要： In this study, device modeling and simulation are conducted to explain the effects of each layer thickness and temperature on the performance of ZnO/CdS/CIS thin film solar cells. Also, the thicknesses of the CIS and CdS absorber layers are considered in this work theoretically and experimentally. The calculations of solar cell performances are based on the solutions of the well-known three coupling equations: the continuity equation for holes and electrons and the Poisson equation. Our simulated results show that the efficiency increases by reducing the CdS thickness. Increasing the CIS thickness can increase the efficiency but it needs more materials. The efficiency is more than 19% for a CIS layer with a thickness of 2 μm. CIS nanoparticles are prepared via the polyol route and purified through centrifugation and precipitation processes. Then nanoparticles are dispersed to obtain stable inks that could be directly used for thin-film deposition via spin coating. We also obtain x-ray diffraction (XRD) peak intensities and absorption spectra for CIS experimentally. Finally, absorption spectra for the CdS window layer in several deposition times are investigated experimentally.

关键词: CIGS solar cell, thin film, efficiency, CdS, XRD

Abstract: In this study, device modeling and simulation are conducted to explain the effects of each layer thickness and temperature on the performance of ZnO/CdS/CIS thin film solar cells. Also, the thicknesses of the CIS and CdS absorber layers are considered in this work theoretically and experimentally. The calculations of solar cell performances are based on the solutions of the well-known three coupling equations: the continuity equation for holes and electrons and the Poisson equation. Our simulated results show that the efficiency increases by reducing the CdS thickness. Increasing the CIS thickness can increase the efficiency but it needs more materials. The efficiency is more than 19% for a CIS layer with a thickness of 2 μm. CIS nanoparticles are prepared via the polyol route and purified through centrifugation and precipitation processes. Then nanoparticles are dispersed to obtain stable inks that could be directly used for thin-film deposition via spin coating. We also obtain x-ray diffraction (XRD) peak intensities and absorption spectra for CIS experimentally. Finally, absorption spectra for the CdS window layer in several deposition times are investigated experimentally.

Key words: CIGS solar cell, thin film, efficiency, CdS, XRD

中图分类号: (Semiconductor compounds)

71.20.Nr

73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 74.20.Pq (Electronic structure calculations) 74.25.Gz (Optical properties)

Hadi Zarei, Rasoul Malekfar. Evaluation of electrical and optical characteristics of ZnO/CdS/CIS thin film solar cell[J]. 中国物理B, 2016, 25(2): 27103-027103.

Hadi Zarei, Rasoul Malekfar. Evaluation of electrical and optical characteristics of ZnO/CdS/CIS thin film solar cell[J]. Chin. Phys. B, 2016, 25(2): 27103-027103.

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