We demonstrate the use of CdSe quantum dots (QDs) as an interlayer for improving photovoltaic performance in the inverted polymer solar cells (iPSCs). The conjugation of CdSe and CdSe@ZnS core@shell QDs between polyethylenimine ethoxylated (PEIE) polymer and PTB7:PC71BM blended layer played an important role in increasing the short circuit current density by Förster resonance energy transfer (FRET) and efficient charge transport. The drastic mutual photoluminescence quenching suggests that the photon energy absorbed by PTB7:PC₇₁BM are effectively transferred to the QDs. The PTB7:PC₇₁BM based iPSCs with the CdSe QDs interlayer exhibits higher power conversion efficiency of 8.13%, which is 13.4% higher than that of the control device. The iPSCs with CdSe@ZnS QDs interlayer showed relatively lower PCE of 7.31%, which could be due to an increase in carrier recombination inside QDs by relatively high energy level of ZnS shell. As a consequence, the enhanced photovoltaic performance of iPSCs with CdSe QDs interlayer can be attributed to an effective charge transport and an increase in the overall photocurrent by FRET.

我们演示了CdSe量子点（QDs）作为中间层的使用，以改善反向聚合物太阳能电池（iPSCs）中的光伏性能。聚乙烯亚胺乙氧基化（PEIE）聚合物和PTB7：PC71BM共混层之间的CdSe和CdSe @ ZnS核壳QD的共轭在通过Förster共振能量转移（FRET）和有效的电荷传输来增加短路电流密度方面起着重要作用。剧烈的相互光致发光猝灭表明，PTB7：PC ₇₁ BM吸收的光子能量有效地传递给了量子点。PTB7：PC ₇₁具有CdSe QDs夹层的基于BM的iPSC具有更高的功率转换效率，为8.13％，比控制设备的功率转换效率高13.4％。具有CdSe @ ZnS QDs夹层的iPSC的PCE相对较低，为7.31％，这可能是由于ZnS壳的较高能级导致QD内部的载流子复合增加。结果，具有CdSe QD夹层的iPSC的增强的光伏性能可归因于有效的电荷传输和FRET所增加的总光电流。