Efficient, stable solar cells by using inherent bandgap of α-phase formamidinium lead iodide
Top Cited Papers
- 8 November 2019
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 366 (6466), 749-753
- https://doi.org/10.1126/science.aay7044
Abstract
In general, mixed cations and anions containing formamidinium (FA), methylammonium (MA), caesium, iodine, and bromine ions are used to stabilize the black α-phase of the FA-based lead triiodide (FAPbI3) in perovskite solar cells. However, additives such as MA, caesium, and bromine widen its bandgap and reduce the thermal stability. We stabilized the α-FAPbI3 phase by doping with methylenediammonium dichloride (MDACl2) and achieved a certified short-circuit current density of between 26.1 and 26.7 milliamperes per square centimeter. With certified power conversion efficiencies (PCEs) of 23.7%, more than 90% of the initial efficiency was maintained after 600 hours of operation with maximum power point tracking under full sunlight illumination in ambient conditions including ultraviolet light. Unencapsulated devices retained more than 90% of their initial PCE even after annealing for 20 hours at 150°C in air and exhibited superior thermal and humidity stability over a control device in which FAPbI3 was stabilized by MAPbBr3.This publication has 51 references indexed in Scilit:
- CH3NH3Cl-Assisted One-Step Solution Growth of CH3NH3PbI3: Structure, Charge-Carrier Dynamics, and Photovoltaic Properties of Perovskite Solar CellsThe Journal of Physical Chemistry C, 2014
- Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cellsEnergy & Environmental Science, 2014
- Formamidinium-Containing Metal-Halide: An Alternative Material for Near-IR Absorption Perovskite Solar CellsThe Journal of Physical Chemistry C, 2013
- Semiconducting Tin and Lead Iodide Perovskites with Organic Cations: Phase Transitions, High Mobilities, and Near-Infrared Photoluminescent PropertiesInorganic Chemistry, 2013
- Generalized Gradient Approximation Made SimplePhysical Review Letters, 1996
- Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis setPhysical Review B, 1996
- Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis setComputational Materials Science, 1996
- Projector augmented-wave methodPhysical Review B, 1994
- Ab initiomolecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germaniumPhysical Review B, 1994
- Ab initiomolecular dynamics for liquid metalsPhysical Review B, 1993