23.7% Efficient inverted perovskite solar cells by dual interfacial modification

Abstract

A dual interfacial modification simultaneously improves all photovoltaic parameters of inverted perovskite solar cells.

Inverted Perovskite Solar Cells: The Emergence of a Highly Stable and Efficient Architecture

“…Moreover, [BMIM]BF 4 can also act as protective Reproduced under terms of the CC-BY-NC license. [43] Copyright 2021, The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.…”

“…Figure 44. a) Chemical structure of PEAI, Cl-PEAI, and F-PEA; b) schematic presentation of the fabrication procedure of the perovskite active layer.Reproduced under terms of the CC-BY-NC license [43]. Copyright 2021, The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.…”

Understanding the PEDOT:PSS, PTAA and P3CT-X Hole-Transport-Layer-Based Inverted Perovskite Solar Cells

“…In the best inverted perovskite solar cell, the PEAI small molecules are used to modify the surfaces of the ultrathin PTAA polymers and perovskite thin film simultaneously [ 70 ], as shown in Figure 5 b. As an interlayer in between the perovskite crystalline thin film and the face-on PTAA polymers, the phenyl group of the PEAI can lie on the face-on PTAA polymers due to the π-π stacking, thereby forming the upward ethylammonium iodide group, which can be considered as the nucleation site of the perovskite thin film.…”

“…In the best inverted perovskite solar cell, the ultrathin PTAA polymer is modified with the PEAI bipolar organic molecules, thereby forming the bridge between the PTAA-modified ITO thin film and the perovskite crystalline thin film, which results in the high PCE of 21.58% [ 70 ]. When the surface of the perovskite crystalline thin film is modified with the PEAI molecules, the PCE increases from 21.58% to 23.72% [ 70 ]. On the other hand, the PCE of the PPS-doped perovskite solar cells increases from 20.0% to 21.7% when the PPS molecule is used as the chemical bridge [ 149 ].…”

“…limit because the absorption bandgap of lead trihalide-based perovskite material is higher than the optimal absorption bandgap [ 67 , 68 ]. Up to now, the highest PCE values of regular perovskite solar cells and inverted perovskite solar cells are 25.59% [ 69 ] and 23.32% [ 70 ], respectively. In the best regular perovskite solar cell, a mesoporous-TiO 2 /compact-TiO 2 bilayer structure is used as the ETL.…”