Issue 10, 2024

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Abstract

Layered two-dimensional (2D) transition-metal chalcogenides (TMCs) attract substantial interest across multiple disciplines due to their unique properties. In perovskite solar cells (PSCs), researchers have extensively explored the integration of 2D TMCs to enhance device power conversion efficiency (PCE) and stability. However, there is a research gap in understanding their impact on inverted (p–i–n) PSCs, especially at the perovskite/electron-transporting layer (ETL) interface. This study addresses this gap by investigating the effect of inserting InSe, MoSe2, and SnS2 nanosheets at the perovskite/ETL interface in inverted PSCs. The introduction of 2D TMC interlayers induces a downward shift in perovskite energy levels, optimizing the energy level alignment at the perovskite/ETL interface and substantially increasing the PCE. The SnS2-incorporating PSCs exhibit the highest relative improvement of 5.05% (InSe and MoSe2 nanosheets yield 3.37% and 2.5% PCE increase, respectively). This enhancement results in an absolute PCE of 18.5% with a fill factor exceeding 82%. Furthermore, the incorporation of InSe nanosheets eliminates the burn-in phase enhancing the long-term stability (T70 of 250 h) of unencapsulated devices. This study underscores the significant improvement in PSCs' PCE and stability by selectively incorporating suitable TMCs at the perovskite/ETL interface. This research offers insights into the potential role of TMCs in advancing PSCs.

Graphical abstract: Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
09 Feb 2024
Accepted
03 Apr 2024
First published
03 Apr 2024
This article is Open Access
Creative Commons BY-NC license

Sustainable Energy Fuels, 2024,8, 2180-2190

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

D. Tsikritzis, K. Chatzimanolis, N. Tzoganakis, K. Rogdakis, M. I. Zappia, B. Martín-García, A. Bagheri, H. Beydaghi, L. Děkanovský, Z. Sofer, S. Bellani, F. Bonaccorso and E. Kymakis, Sustainable Energy Fuels, 2024, 8, 2180 DOI: 10.1039/D4SE00212A

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