Influence of morphological tuned nanostructure hybrid layers on efficient bulk heterojunction organic solar cell and X-ray detector performances

Abstract

This work involves the investigation of effects of nanostructures composed PCDTBT and PCBM active layers in glass/ITO/HTL/active-layer/LiF/Al structured bulk heterojunction (BHJ) organic solar cells and photodetectors. Solution-treated MoO3, MoS2, and MoO3-MoS2 hybrids were used to fabricate the BHJ solar cells and photodetectors. The results show that the MoO3-MoS2 incorporated active layers possessed high charge carrier capacities and exciton dissociation properties compared with the pure MoS2 and MoO3 blended matrices. Microscopic studies revealed the formation of palm-bark-cell structured MoO3-MoS2 hybrid which efficiently influenced for better charge carrier transport behavior. Further, different weight ratios of MoO3-MoS2 dispersed polymer junctions were fabricated to evaluate the impact of conjunction formation on developing charge transport characteristics. The power conversion efficiency (PCE) of -6.18% for MoO3-MoS2 dispersed polymer junction device realized the 38% improvement with respect to pure PCDTBT:PCBM active layer (PCE = 4.47%). Moreover, a maximum sensitivity of 1.89 mA/Gy.cm(2) was realized under X-ray airing for the photodetector with the MoO3-MoS2 blended PCDTBT and PCBM active layer. Owing to the ease of fabrication and morphologically tuned 2D atomic layer infusion into fullerene derivative/polymer junctions, it would be feasible for improving the interfacial behaviors to achieve better organic electronic devices.