State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering , Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) , Xi'an 710072 , China.
Department of Mechanical Engineering , University of Delaware , Newark , Delaware 19716 , United States.
ACS Appl Mater Interfaces. 2018 Apr 11;10(14):11580-11586. doi: 10.1021/acsami.7b17044. Epub 2018 Mar 30.
Organic dyes used in the conventional dye-sensitized solar cells (DSSCs) suffer from poor light stability and high cost. In this work, we demonstrate a new inorganic sensitized solar cell based on ordered one-dimensional semiconductor nanorod arrays of TiO/NiTiO (NTO) heterostructures prepared via a facile two-step hydrothermal approach. The semiconductor heterostructure arrays are highly desirable and promising for DSSCs because of their direct charge transport capability and slow charge recombination rate. The low-cost NTO inorganic semiconductor possesses an appropriate band gap that matches well with TiO, which behaves like a "dye" to enable efficient light harvesting and fast electron-hole separation. The solar cells constructed by the ordered TiO/NTO heterostructure photoanodes show a significantly improved power conversion efficiency, high fill factor, and more promising, outstanding life stability. The present work will open up an avenue to design heterostructured inorganics for high-performance solar cells.
用于传统染料敏化太阳能电池 (DSSC) 的有机染料存在着稳定性差和成本高的问题。在这项工作中，我们通过简便的两步水热法展示了一种基于有序一维半导体纳米棒阵列的新型无机敏化太阳能电池，该纳米棒阵列由 TiO/NiTiO (NTO) 异质结构组成。由于具有直接电荷传输能力和缓慢的电荷复合率，半导体异质结构阵列非常适合 DSSC。低成本的 NTO 无机半导体具有合适的带隙，与 TiO 匹配良好，TiO 可以作为“染料”，从而实现高效的光捕获和快速的电子-空穴分离。由有序 TiO/NTO 异质结构光阳极构建的太阳能电池表现出显著提高的功率转换效率、高填充因子以及更有前景的出色寿命稳定性。本工作将为设计高性能太阳能电池的异质结构无机材料开辟一条途径。
