Issue 19, 2023

Enhanced performance of perovskite solar cells via a bilateral electron-donating passivator as a molecule bridge

Abstract

Defects at the buried interface are the primary factors contributing to recombination losses and instability in perovskite solar cells (PSCs) with n–i–p structure. Here, a molecule with bilateral electron-donating groups, 6-amino-1-hexanol (HAL), is introduced between SnO2 and perovskite (PVK) to optimize the characteristics of the buried interfacial properties, as well as the PVK film quality. The surface defects of SnO2 can be more effectively passivated, and its energy level structure can be tuned more appropriately. Meanwhile, the electron-donating groups in HAL can passivate the Pb2+ defects and stabilize the [PbI6]4− octahedra at the buried interface. With the assistance of bilateral electron-donating groups, HAL can act as a molecular bridge to easily bridge SnO2 and PVK to passivate the buried interfacial defects, thus enhancing device performance. As a result, the photovoltaic performance was significantly improved by the buried modification with HAL, ultimately achieving a champion PCE of 23.58%, far superior to the inferior PCE of 21.30% of the pristine device. Furthermore, after 35 days of storage at approximately 35% relative humidity (RH) and room temperature, the device based on HAL-modified SnO2 demonstrates significantly better stability than the pristine device, as it still maintains over 90% of the initial efficiency. This study provides an effective molecular bridge strategy for further enhancing the performance of PSCs.

Graphical abstract: Enhanced performance of perovskite solar cells via a bilateral electron-donating passivator as a molecule bridge

Supplementary files

Article information

Article type
Research Article
Submitted
03 Aga 2023
Accepted
23 Aga 2023
First published
29 Aga 2023

Inorg. Chem. Front., 2023,10, 5734-5744

Enhanced performance of perovskite solar cells via a bilateral electron-donating passivator as a molecule bridge

W. Pan, P. Chen, S. Zhu, R. He, Q. Zheng, F. Cao, Z. Lan, J. Wu, W. Sun and Y. Li, Inorg. Chem. Front., 2023, 10, 5734 DOI: 10.1039/D3QI01531A

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