NDLI: Compound surface textures for enhanced near-infrared light havesting of crystallin silicon solar cells

Content Provider	IEEE Xplore Digital Library
Author	Chia-Hua Chang Peichen Yu Min-Hsiang Hsu Ping-Cheng Tseng Wei-Lun Chang Wen-Ching Sun Wei-Chih Hsu Shih-Hsin Hsu Yia-Chung Chang
Copyright Year	2011
Description	Author affiliation: Green Energy & Environment Research Labs, Industrial Technology Research Institute, Hsinchu, Taiwan (Wei-Lun Chang; Wen-Ching Sun; Wei-Chih Hsu) \|\| Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu, Taiwan (Chia-Hua Chang; Peichen Yu; Min-Hsiang Hsu; Ping-Cheng Tseng) \|\| Research Center for Applied Sciences, Taipei, Taiwan (Shih-Hsin Hsu; Yia-Chung Chang)
Abstract	As silicon photovoltaics evolve towards thin-wafer technologies, efficient optical absorption for the near-infrared wavelengths has become particularly challenging. In this work, we present a solution that employs combined micro- and nano-scale surface textures to increase light harvesting in the near-infrared for crystalline silicon photovoltaics, and discuss the associated antireflection and scattering mechanisms. The surface textures are achieved by uniformly depositing a layer of indium-tin-oxide nanowhiskers on micro-grooved silicon substrates using electron-beam evaporation. The nanowhiskers facilitate optical transmission in the near-infrared by functioning as impedance matching layers with effective refractive indices gradually varying from 1 to 1.3. Materials with such unique refractive index characteristics are not readily available in nature. Compared to the reflectance of the conventional silicon solar cell, the combined textures structure provided broadband high absorption, especially in the near infrared region. As a result, the solar cell with combined textures achieves over 90% external quantum efficiencies for a broad wavelength range of 460 to 980 nm, which is crucial to the development of advanced thin-substrate silicon solar cells. Due to the high photocurrent contributed to the performance, the compound textured solar cell increased the 1.1% absolute power conversion efficiency, from 16.1% to 17.2%.
Starting Page	000009
Ending Page	000012
File Size	433532
Page Count	4
File Format	PDF
ISBN	9781424499663
ISSN	01608371
e-ISBN	9781424499656
DOI	10.1109/PVSC.2011.6185832
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Silicon Photovoltaic cells Indium tin oxide Optical surface waves Reflectivity Optical reflection Optical variables control
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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