Enhancing the performance of dye-sensitized solar cells: doping SnO2 photoanodes with Al to simultaneously improve conduction band and electron lifetime

Enhancing the performance of dye-sensitized solar cells: doping SnO2 photoanodes with Al to simultaneously improve conduction band and electron lifetime
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提高染料敏化太阳能电池的性能:用Al掺杂SnO2光阳极,同时提高导带和电子寿命

DOI:
10.1039/c4ta05923a
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发表时间:
2015-01
影响因子:
11.9
通讯作者:
Pan, Feng
Pan, Feng
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhang, Qian;Zhou, Xiaowen;Lin, Yuan;Pan, Feng

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SnO2是TiO2的重要替代物,用作染料敏化太阳能电池(DSSC)光阳极中的半导体。在这项工作中,我们通过简单的水热法制备了SnO 2和Al掺杂的SnO 2纳米晶,并首次发现Al掺杂样品的导带调谐和电荷复合抑制同时得到改善。通过用Al掺杂SnO2光阳极,电子寿命显著提高,并且导带边缘负移。与未掺杂的SnO2 DSSC(AM 1.5,100 mW cm−2)相比,优化的Al掺杂SnO2 DSSC的功率转换效率(η)提高了75%。在用TiCl 4处理之后,基于Al掺杂的SnO2纳米晶体的DSSC的最高η为约6.91%,这是基于SnO2的DSSC的高的总体光转换效率。
SnO2 is an important alternative to TiO2 for use as a semiconductor in dye-sensitized solar cell (DSSC) photoanodes. In this work, we prepared SnO2 and Al-doped SnO2 nanocrystals via a simple hydrothermal method, and found for the first time that the tuning of the conduction band and suppression of charge recombination are simultaneously improved in the Al-doped samples. The electron lifetime is significantly improved and the conduction band edge is shifted negatively by doping the SnO2 photoanode with Al. Compared to the undoped SnO2 DSSCs (AM 1.5, 100 mW cm−2), the power conversion efficiency (η) of the optimized Al-doped SnO2 DSSCs is enhanced by 75%. After being treated with TiCl4, the highest η of DSSCs based on Al-doped SnO2 nanocrystals is approximately 6.91%, which is a high overall photoconversion efficiency for SnO2-based DSSCs.
独特的掺锌 SnO2 纳米海胆具有优异的电子传输和光捕获性能,可作为高性能染料敏化太阳能电池的光阳极材料
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