The origin of efficiency enhancement of inorganic/organic Hybrid solar Cells by robust samarium phosphate nanophosphors

The potential powerful role of SmPO4 playing in inorganic/organic bulk-heterojunction solar cell was explored and the innate photogeneration dynamics was unveiled. The energy levels of conduction band as well as valence band of acceptor TiO2 have been evaluated by 0.57 eV and 0.32 eV, respectively. Consequently the hot electron transfer time from donor to acceptor shortens by 40% (i.e., from τh-e=30.2 to 17.9 ps) and the hole transfer time has been boosted by almost 20% (i.e., from 6.92 to 5.58 ns). After incorporating SmPO4 into TiO2 films, inorganic/organic bulk-heterojunction solar cell delivers an improved power conversion efficiency of approaching 3% at 5 wt% as compared to 1.98% of pure TiO2.182