Effects of Nanostructured Back Reflectors on the External Quantum Efficiency in Thin Film Solar Cells

作     者：Chingmei Hsu George F. Burkhard Michael D. McGehee Yi Cui 

作者机构：Department of Materials Science and Engineering Stanford University Stanford California 94305 USA Department of Applied Physics Stanlbrd University Stanlbrd California 94305 USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2011年第4卷第2期

页      码：153-158页

摘      要：Hydrogenated amorphous Si （a-Si：H） is a promising material for photovoltaic applications due to its low cost, high abundance, long lifetime, and non-toxicity. We demonstrate a device designed to investigate the effect of nanostructured back reflectors on quantum efficiency in photovoltaic devices. We adopt a superstrate configuration so that we may use conventional industrial light trapping strategies for thin film solar cells as a reference for comparison. We controlled the nanostructure parameters via a wafer-scale self-assembly technique and systematically studied the relation between nanostructure size and photocurrent generation. The gain/loss transition at short wavelengths showed red-shifts with decreasing nanostructure scale. In the infrared region the nanostructured back reflector shows large photocurrent enhancement with a modified feature scale. This device geometry is a useful archetype for investigating absorption enhancement by nanostructures.

主 题 词：Solar cells back reflector scattering solar energy amorphous silicon 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 0803[工学-仪器类] 

核心收录：

D　O　I：10.1007/s12274-010-0064-y

馆 藏 号：203161047...