Full SnO2 double-layer dye-sensitized solar cells: Slowly increasing phenomenon of power conversion efficiency
Full SnO2 double-layer dye-sensitized solar cells: Slowly increasing phenomenon of power conversion efficiency
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全SnO2双层染料敏化太阳能电池：电能转换效率缓慢提高的现象
DOI：
10.1016/j.solener.2019.12.015
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发表时间：
2020-01
期刊：
影响因子：
6.7
通讯作者：
Chen Tongcai
中科院分区：
文献类型：
--
作者：
Duan Junhong;Zou Shibing;Yang Chunmin;Liu Weiqing;Wu Huaming;Chen Tongcai
染料敏化太阳能电池（dsc）已被证明是一种低成本和大规模太阳能转换应用的有效光伏器件。快速的电子传递、大的比表面积和缓慢的界面电子复合是高效光电极不可缺少的特征。在这项工作中，我们报道了完整的sno2双层dsc。采用水热法制备了sno2纳米粒子作为电子传输层和大粒子作为散射层。在sno2薄膜表面形成超薄al2o3阻挡层，通过在Al (NO3)3溶液中浸泡并在大气中依次退火来延缓电子向电解质或氧化染料分子的反转移。分别制备了SnO2、SnO2/SL、SnO2/ al2o3和SnO2/SL/ al2o3薄膜作为光阳极的四种电池，并对其功率转换效率（PCE）进行了60天的连续测试。在测试过程中，四种电池的开路电压（Voc）、填充系数（FF）和PCE逐渐提高，而短路电流（Jsc）略有降低。结果表明，SnO2基DSC的PCE从1.36% （0 d）提高到3.5% (20 d)， SnO2/SL/ al2o3基DSC的PCE从2.53% （0 d）提高到4.57% （20 d）。在sno2dsc中观察到的这种新的PCE缓慢增加现象不同于tio2和ZnO。dsc的这种结构和缓慢增加的现象对理解dsc的工作机理和提高效率具有深远的意义。
Dye-sensitized solar cells (DSCs) have been proven as effective photovoltaic devices for low-cost and large-scale solar energy conversion applications. Fast electron transport, large specific surface area, and slow interfacial electron recombination are indispensable features for an efficient photoelectrode. In this work, we report full SnO2double-layer DSCs. SnO2nanoparticles as electron transport layer and large SnO2particles as scattering layer (SL) are prepared by the hydrothermal method, respectively. Ultrathin Al2O3barrier layer on the surface of SnO2film is formed by immersing in Al (NO3)3solutions and annealed at atmosphere in turn to retard back transfer of electrons to the electrolyte or to the oxidized dye molecules. Four kind cells with SnO2, SnO2/SL, SnO2/Al2O3and SnO2/SL/Al2O3film as photoanodes were fabricated, respectively, and their power conversion efficiency (PCE) was continuously tested for 60 days. The open-circuit voltage (Voc), fill factor (FF) and PCE of four kind cells are gradually improved, while short-circuit current (Jsc) is slightly reduced during testing. As a result, the PCE of the SnO2based DSC increased from 1.36% (0 day) to 3.5% (20 day), and the PCE of the SnO2/SL/Al2O3based DSC increased from 2.53% (0 day) to 4.57% (20 day). This novel slow increasing phenomenon of PCE observed in SnO2DSCs is different from that of TiO2and ZnO. This kind of structure of DSCs and the slowly increasing phenomenon have far-reaching significance for understanding the working mechanism and increasing efficiency.
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影响因子：
3.1
作者：
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影响因子：
8.6
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影响因子：
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作者：
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影响因子：
6.6
作者：
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通讯作者：
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