Blue sensitizers for solar cells: Natural dyes from Calafate and Jaboticaba

被引：198

作者：

Polo, Andre Sarto ^{[1
]}

Iha, Neyde Yukle Murakami ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim, Lab Inorgan Photochem & Energy Convers, Sao Paulo, SP, Brazil

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2006年 / 90卷 / 13期

基金：

巴西圣保罗研究基金会;

关键词：

dye-sensitized solar cell; natural dyes; clean and renewable energy; energy conversion; natural sensitizers;

D O I：

10.1016/j.solmat.2006.02.006

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Blue-violet anthocyanins from Jaboticaba (Myrtus cauliflora Mart) and Calafate (Berberies buxifolia Lam) were employed as TiO2, dye-sensitizers. Solar cells sensitized by Jaboticaba extracts achieved up to J(SC) = 9.0 mA cm(-2), V-OC = 0.59 V, P-max = 1.9 MW cm(-2) and ff = 0.54, while for Calafate sensitized cells the values determined were up to J(SC) = 6.2 mA cm(-2), V-OC = 0.47 V, P-max = 1.1 MW cm(-2) and ff = 0.36. Other natural dyes were evaluated without significant photocurrent, demonstrating that only selected extracts are capable of converting sunlight in electricity. The results obtained with extracts of Jaboticaba and Calafate show a successful conversion of visible light into electricity by using natural dyes as wide band-gap semiconductor sensitizers in dye-sensitized solar cells. It also represents an environmentally friendly alternative for dye-sensitized solar cells with low cost production and an excellent system for educational purposes. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1936 / 1944

页数：9

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