Shen Chao, Fichou Denis, Wang Qing
Department of Materials Science and Engineering, Faculty of Engineering, NUSNNI-NanoCore, National University of Singapore, 117576, Singapore, Singapore.
School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, Singapore.
Chem Asian J. 2016 Apr 20;11(8):1183-93. doi: 10.1002/asia.201600034. Epub 2016 Mar 24.
Quantum-dot-sensitized solar cells (QDSCs) are promising solar-energy-conversion devices, as low-cost alternatives to the prevailing photovoltaic technologies. Compared with molecular dyes, nanocrystalline quantum dot (QD) light absorbers exhibit higher molar extinction coefficients and a tunable photoresponse. However, the power-conversion efficiencies (PCEs) of QDSCs are generally below 9.5 %, far behind their molecular sensitizer counterparts (up to 13 %). These low PCEs have been attributed to a large free-energy loss during sensitizer regeneration, energy loss during the charge-carrier transport and transfer processes, and inefficient charge separation at the QD/electrolyte interfaces, and various interfacial engineering strategies for enhancing the PCE and cell stability have been reported. Herein, we review recent progress in the interfacial engineering of QDSCs and discuss future prospects for the development of highly efficient and stable QDSCs.
量子点敏化太阳能电池（QDSCs）作为当前光伏技术的低成本替代品，是很有前景的太阳能转换装置。与分子染料相比，纳米晶量子点（QD）光吸收剂表现出更高的摩尔消光系数和可调谐的光响应。然而，QDSCs的功率转换效率（PCEs）通常低于9.5%，远远落后于其分子敏化剂同类产品（高达13%）。这些低PCEs归因于敏化剂再生过程中的大量自由能损失、电荷载流子传输和转移过程中的能量损失，以及QD/电解质界面处低效的电荷分离，并且已经报道了各种用于提高PCE和电池稳定性的界面工程策略。在此，我们综述了QDSCs界面工程的最新进展，并讨论了高效稳定QDSCs发展的未来前景。
