ANALYSIS FOR NON-RADIATIVE RECOMBINATION IN QUANTUM DOT SOLAR CELLS AND MATERIALS

摘要

Quantum dot (QD) solar cells have drawn much attention of research because of their capability of tuning the band gap and potential of realizing many novel concepts such as intermediate transitions. However, high non-radiative recombination rates in the quantum dot layer stands in the way of realizing high-efficiency QD solar cells. In this paper, efficiency potential of QD solar cells is discussed based on external radiative efficiency (ERE), open-circuit voltage loss and fill factor loss and non-radiative recombination loss via current-voltage characteristics in detailed balance model. Intrinsic loss of QD solar cells is substantially increased with increase in binding energy and volume density ofQDs. External radiative efficiency of QD solar cells is decreased with increase in binding energy and volume density of QDs due to non-radiative recombination.