Interface engineering of highly efficient perovskite solar cells

Abstract

Advancing perovskite solar cell technologies toward their theoretical power conversion efficiency (PCE) requires delicate control over the carrier dynamics throughout the entire device. By controlling the formation of the perovskite layer and careful choices of other materials, we suppressed carrier recombination in the absorber, facilitated carrier injection into the carrier transport layers, and maintained good carrier extraction at the electrodes. When measured via reverse bias scan, cell PCE is typically boosted to 16.6% on average, with the highest efficiency of ~19.3% in a planar geometry without antireflective coating. The fabrication of our perovskite solar cells was conducted in air and from solution at low temperatures, which should simplify manufacturing of large-area perovskite devices that are inexpensive and perform at high levels.

Periodic Organic–Inorganic Halide Perovskite Microplatelet Arrays on Silicon Substrates for Room‐Temperature Lasing

“…This outstanding performance can be traced to their long carrier lifetimes, long diffusion length, and low trap densities 9, 10, 11, 12. These excellent properties, along with their high quantum yield and wavelength tunability, make halide perovskites ideal for light‐emission applications such as for light‐emitting diodes (LEDs), light‐emitting field‐effect transistors, and lasing 13, 14, 15, 16, 17, 18, 19.…”

Control of Emission Color of High Quantum Yield CH3NH3PbBr3 Perovskite Quantum Dots by Precipitation Temperature

“…Amongst them, organic–inorganic hybrid perovskites, such as organo‐lead halide perovskites (with general structure APbX 3, where A represents a small molecule organic amine, and X is a halide) can be prepared at low cost and show useful optical properties, as well as superior electrical conductivity 4, 7, 8, 9. Specifically, the iodide and bromide based CH 3 NH 3 PbX 3 have drawn extensive attention for their breakthrough performance in thin film mesoporous oxide solar cells where power conversion efficiencies of nearly 20% have already been reported 7, 9, 10, 11, 12, 13, 14, 15, 16. The same material also shows great potential in lasing and LEDs applications 17, 18, 19, 20…”

Aqueous‐Containing Precursor Solutions for Efficient Perovskite Solar Cells

“…Perovskite solar cells have emerged as competitive solution‐processed candidates for photovoltaic applications due to the demonstration of high power conversion efficiency (PCE), ease of fabrication, and low materials cost 1, 2, 3, 4, 5, 6, 7, 8, 9. The efficiency of perovskite solar cells has rapidly risen from 3.8% to over 22.1% just within the past several years 10, 11.…”