Determining interface properties limiting open-circuit voltage in heterojunction solar cells

Relating the open-circuit voltage to interface molecular properties of donor:acceptor bulk heterojunction solar cells

Effects of Mg composition on open circuit voltage of Cu2O–MgxZn1 xO heterojunction solar cells

MgxZn1 xO (0rxr0.13) films grown by metal-organic chemical vapor deposition (MOCVD) were chosen as the n-type semiconductor layer forming a heterojunction with electrodeposited p-type cuprous oxide (Cu2O) for photovoltaic applications in this study. We investigated the effects of Mg contents (x) on the performance of Ag–Cu2O–MgxZn1 xO–fluorine-doped tin oxide (FTO)-glass heterojunction solar ce...

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

We have recently reported on a small organic molecule containing a bithiophene core with end-capping phthalimide units (PthTh2Pth) that exhibited a H-aggregation tendency in the solid state and high electron mobility in organic field effect transistors. In this contribution, we have studied both the physical and electrical properties of poly(3-hexylthiophene) (P3HT) and PthTh2Pth thin films by ...

Open-Circuit Voltage Physics in Amorphous Silicon Solar Cells

We have performed computer calculations to explore effects of the p/i interface on the opencircuit voltage in a-Si:H based pin solar cells. The principal conclusions are that interface limitation can occur for values of VOC significantly below the built-in potential VBI of a cell, and that the effects can be understood in terms of thermionic emission of electrons from the intrinsic layer into t...

Polymer solar cells with enhanced open-circuit voltage and efficiency

Following the development of the bulk heterojunction1 structure, recent years have seen a dramatic improvement in the efficiency of polymer solar cells. Maximizing the open-circuit voltage in a low-bandgap polymer is one of the critical factors towards enabling high-efficiency solar cells. Study of the relation between open-circuit voltage and the energy levels of the donor/acceptor2 in bulk he...