Au nanoparticle-decorated urchin-like TiO2 hierarchical microspheres for high performance dye-sensitized solar cells
Au nanoparticle-decorated urchin-like TiO2 hierarchical microspheres for high performance dye-sensitized solar cells
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用于高性能染料敏化太阳能电池的金纳米粒子装饰的海胆状二氧化钛分级微球
DOI：
10.1016/j.electacta.2018.10.035
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发表时间：
2019
影响因子：
6.6
通讯作者：
Xu Jinzhang
中科院分区：
文献类型：
--
作者：
Li Yuan;Zhou Yusheng;Wang Yong;Zhou Ru;Ling Qiang;Niu Haihong;Zhang Wei;Wang Chaoqun;Qiu Jihong;Guo Zhiqiang;Xu Jinzhang
采用一锅水热法合成了具有331 m2 g − 1超大比表面积的海胆状TiO 2分级微球（UTHM），并对其在染料敏化太阳能电池（DSSC）中的应用进行了研究。进一步在UTHM表面原位生长Au纳米粒子（NPs），得到Au修饰的UTHM（Au-UTHM）。通过将不同质量比的Au-UTHM和UTHM复合使用，设计了一系列新型复合光阳极薄膜。在Au-UTHM与UTHM的最佳比例为2wt%的条件下制备的复合光阳极构成的DSSC产生了7.21%的相当大的功率转换效率，这明显高于纯P25 NPs基器件（5.19%）和纯UTHM基器件（6.10%）。基于复合光阳极的DSSC的显著增强的性能可以归因于两个益处的协同效应：（1）由UTHM的新颖分级特征引起的大的比表面积、强的光散射和快速的电子转移通道，以及（2）由于Au NPs的局域表面等离子体共振（LSPR）效应而增强的光吸收。
Urchin-like TiO2hierarchical microspheres (UTHMs) with an extremely large surface area of 331 m2g−1were synthesized via a facile one-pot hydrothermal method and studied for dye-sensitized solar cells (DSSCs) application. In-situ growth of Au nanoparticles (NPs) on the surface of the UTHMs were further conducted to achieve Au-decorated UTHMs (Au-UTHMs). A series of novel composite photoanode films were designed through the combined use of Au-UTHMs and UTHMs at different mass ratios. The DSSC constructed with the composite photoanode prepared under an optimal Au-UTHMs to UTHMs ratio of 2 wt% yields a considerable power conversion efficiency of 7.21%, which was markedly higher than that of the pure P25 NPs based device (5.19%) and pure UTHMs based device (6.10%). The significantly enhanced performance of the composite photoanode based DSSC can be attributed to the synergistic effect of two benefits: (1) the large specific surface area, strong light scattering and fast electron transfer channels arising from the novel hierarchical features of UTHMs, and (2) the enhanced light absorption owing to the localized surface plasmon resonance (LSPR) effect of Au NPs.