• Connor, Paul Alexander
• Irvine, John T. S.
• Svrcek, Vladimir
• Ni, Chengsheng
• Mariotti, Davide
• Mcdonald, Calum
• Maguire, Paul

Abstract

Over the past decade, lead halide perovskites have emerged as one of the leading photovoltaic materials due to their long carrier lifetimes, high absorption coefficients, high tolerance to defects, and facile processing methods. With a bandgap of ~1.6 eV, lead halide perovskite solar cells have achieved power conversion efficiencies in excess of 25%. Despite this, poor material stability along with lead contamination remains a significant barrier to commercialization. Recently,low-dimensional perovskites, where at least one of the structural dimensions is measured on thenanoscale, have demonstrated significantly higher stabilities, and although their power conversion efficiencies are slightly lower, these materials also open up the possibility of quantum-confinementeffects such as carrier multiplication. Furthermore, both bulk perovskites and low-dimensionalperovskites have been demonstrated to form hybrids with silicon nanocrystals, where numerousdevice architectures can be exploited to improve efficiency. In this review, we provide an overviewof perovskite solar cells, and report the current progress in nanoscale perovskites, such as low- dimensional perovskites, perovskite quantum dots, and perovskite-nanocrystal hybrid solar cells.

Topics

• perovskite
• impedance spectroscopy
• Silicon
• defect
• quantum dot