Issue 12, 2023

A 2D/3D heterojunction engineered for carbon-based hole-transport-layer-free perovskite solar cells

Abstract

The formation of a two-dimensional (2D) perovskite layer on the top of three-dimensional (3D) perovskite has been demonstrated to be effective in reducing interfacial charge recombination and improving the performance and stability of perovskite solar cells (PSCs). However, it is difficult to fabricate a 2D/3D perovskite heterojunction with accurate composition and structure through a solution-only process, and the location of the 2D perovskite is also difficult to regulate owing to the uncontrolled cation exchange between organic constituents, which results in mismatched energy level arrangements. Herein, a 2D perovskite with a spacer cation of 1,4-dimethylphenylene ammonium is grown on 3D perovskite film by the solid-state heat-pressure method. The relevant growth process, light absorption ability, energy level regulation, and stability of the samples are systematically investigated. A broad range of experimental characterizations show that the introduction of 2D perovskite improves the energy level alignment with the adjacent carbon electrode and enhances the hydrophobic property of the perovskite sample. As a result, a remarkable power conversion efficiency (PCE) of 15.63% is achieved for the carbon-based hole-transport-layer-free PSCs based on 2D/3D heterojunction, which is higher than that of the control 3D device (11.88%). Simultaneously, the improved device retains 90% of its initial performance after aging for 1000 h in ambient conditions. The present work opens a new avenue for designing 2D/3D perovskite heterojunctions and improving the performance and stability of PSCs.

Graphical abstract: A 2D/3D heterojunction engineered for carbon-based hole-transport-layer-free perovskite solar cells

Article information

Article type
Paper
Submitted
01 Dzi 2023
Accepted
14 Mud 2023
First published
15 Mud 2023

Sustainable Energy Fuels, 2023,7, 2853-2860

A 2D/3D heterojunction engineered for carbon-based hole-transport-layer-free perovskite solar cells

Y. Wang, T. Liu, J. Zhang, H. Liu, H. Li, Y. Lv, X. Guo, X. Liu, L. Tu, Y. Chang and B. Li, Sustainable Energy Fuels, 2023, 7, 2853 DOI: 10.1039/D3SE00429E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements