Despite great efforts dedicated to enhance power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs) in the past two decades, the efficiency of QDSSCs is still far behind its theoretical value. The present approaches for improving PCE are mainly focused on tailoring the bandgap of QDs to broadening light-harvesting and optimizing interfaces of component parts. Herein, a new solar cell architecture is proposed by integrating concentrating solar cell (CPV) concept into QDSSCs with double photoanode design. The Cu₂S mesh is used as a counter electrode and sandwiched between two photoanodes. This designed battery structure can increase the PCE by 260% compared with a single photoanode. With the most extensively used CdS/CdSe QD sensitizers, a champion PCE of 8.28% (V_oc = 0.629 V, J_sc = 32.247 mA cm⁻2) was achieved. This is mainly due to the increase in J_sc due to the double photoanode design and adoption of the CPV concept. In addition, another reason is that concentrated sunshine illumination induced a photothermal effect, accelerating the preceding chemical reactions associated with the conversion of polysulfide species. The cell fabrication and design reported here provides a new insight for further development of QDSSCs.

尽管在过去的二十年中致力于提高量子点敏化太阳能电池（QDSSC）的功率转换效率（PCE）的巨大努力，但QDSSC的效率仍远远低于其理论值。当前改善PCE的方法主要集中在定制QD的带隙以扩大光收集和优化组件的界面。在此，通过将集中式太阳能电池（CPV）概念集成到具有双光电阳极设计的QDSSC中，提出了一种新的太阳能电池体系结构。Cu ₂ S筛网用作对电极，并夹在两个光电阳极之间。与单个光电阳极相比，这种设计的电池结构可以使PCE增加260％。凭借使用最广泛的CdS / CdSe QD敏化剂，冠军PCE为8.28％（V_oc = 0.629 V，J _sc = 32.247 mA cm ^- 2）。这主要是由于双光阳极设计和采用CPV概念导致J _sc的增加。另外，另一个原因是集中的日光照射引起光热效应，从而加速了先前与多硫化物物种转化有关的化学反应。此处报道的电池制造和设计为QDSSC的进一步开发提供了新的见识。