Self-organized phase segregation between inorganic nanocrystals and PC61BM for hybrid high-efficiency bulk heterojunction photovoltaic cells

Abstract

We demonstrate a simple approach to generate phase segregation between colloidal PbS nanocrystals (NCs) and organic [6,6]-phenyl ${\text{C}}_{61}$ butyric acid methyl ester $\left({\text{PC}}_{61}\text{BM}\right)$ . Continuous vertical phase segregation is observed in cross-linked composite films of NCs and ${\text{PC}}_{61}\text{BM}$ . Hybrid bulk heterojunction photovoltaic cells fabricated with the phase segreated composite layer have achieved the state-of-art power conversion efficiency of 3.7% under one sun of simulated Air Mass 1.5 Global solar irradiation. The presented method can be generally applied in other NC/organic systems for the development of hybrid heterojunction photovoltaic cells.