Showing papers by "Shufen Chen published in 2017"

Inverse-architecture perovskite solar cells with 5,6,11,12-tetraphenylnaphthacene as a hole conductor

Abstract: 5,6,11,12-Tetraphenylnaphthacene (rub), an organic small molecular semiconductor widely used in organic field-effect transistors and organic light-emitting diodes, was introduced into MAPbI3-based inverse-architecture perovskite solar cells as a hole transport layer due to its high hole mobility, good hydrophobic properties, favourable highest occupied molecular orbital (HOMO), low-cost, and low-temperature treatment process of rub. A high open-circuit voltage of 0.96 V, short-circuit current of 22 mA cm−2, and power conversion efficiency of 14.3% were achieved in the inverted planar heterostructure perovskite solar cells based on the rub hole-transport layer due to the HOMO energy level matching between rub and MAPbI3, large hole conductivity of rub, and large crystalline grain size of MAPbI3 formed on rub.

Poly(sodium 4-styrenseulfonate)-modified monolayer graphene for anode applications of organic photovoltaic cells

Abstract: An insulated poly(sodium 4-styrenseulfonate) (PSS) was used to modify monolayer graphene for anode applications of organic photovoltaics (OPVs). With this PSS interfacial modification layer, the OPVs showed a significant increase of 56.4% in efficiency due to an improved work function and hydrophilic feature of graphene and an enlarged recombination resistance of carriers/excitons. Doping a highly contorted 1,2,5-thiadiazole-fused 12-ring polyaromatic hydrocarbon into the active layer to form ternary blended OPVs further enlarged the recombination resistance of carriers/excitons and improved light absorption of the active layer, with which a high power conversion efficiency of 6.29% was acquired.