Light absorption plays an important role in improving the power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs). In this study, a multifunctional long-persistence phosphor (LPP) layer was introduced into the CdS/CdSe QDSSCs via a simple doctor blade method. The LPP layer can simultaneously improve the light harvesting and photo charge transfer in CdS/CdSe QDSSCs. As a result, their short-circuit current and corresponding PCE are effectively enhanced. The PCE can reach up to 5.07%, which is about 24% larger than that of the conventional CdS/CdSe QDSSCs without LPP layer. The solar cells can work in dark for a while due to the long-lasting fluorescence of the LPP layer. This research provides an effective way to improve the PCE of QDSSCs, and finds the possibility for all-weather QDSSCs.

光吸收在提高量子点敏化太阳能电池（QDSSC）的功率转换效率（PCE）中起着重要作用。在这项研究中，多官能长余辉荧光体（LPP）层引入的CdS /的CdSe QDSSCs经由一种简单的刮墨刀方法。LPP层可以同时改善CdS / CdSe QDSSC中的光收集和光电荷转移。结果，有效地增强了它们的短路电流和相应的PCE。PCE可以达到5.07％，这比不具有LPP层的常规CdS / CdSe QDSSC的PCE约大24％。由于LPP层的持久荧光，太阳能电池可以在黑暗中工作一段时间。这项研究为提高QDSSC的PCE提供了有效的方法，并发现了全天候QDSSC的可能性。