Work

Ordered Crystallographic Orientation of Dion–Jacobson 2D Perovskites for Ultrastable Solar Cells

Year: 2026

Type: article

Abstract: ABSTRACT Dion–Jacobson (DJ) 2D perovskites show great potential in stability but do not meet theoretical expectations for photovoltaics due to the random crystallographic orientation in films. We herein report ordered crystallographic orientation of the DJ 2D perovskite, achieved by modifying the intermediate‐phase film with a Ruddlesden‐Popper (RP) phase 2D perovskite based on the two‐step processing method. The introduction of the RP 2D perovskite lowers the energy barrier for the transition from the intermediate phase to the 2D perovskite phase with the ordered alignment, and this strategy is applicable to various organic diammoniums‐based DJ 2D perovskites. Solar cells with oriented DJ 2D perovskite films achieve an efficiency of 21.1% (19.05% for 1 cm 2 devices) and exhibit outstanding stability by retaining 98.1% of initial efficiency after 2000 h of maximum power point tracking at 65°C under continuous 1‐sun illumination (ISOS‐L‐2 protocol) and 98.7% after 2500 h testing at a relative humidity of 85%.

Source: Advanced Materials

DOI: 10.1002/adma.75388

Authors: Xiaotao Liu, Jiangshan Qu, Hao Tian, Zhanjun Zhu, Xin Guo, Can Li

Institutions: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, University of Chinese Academy of Sciences

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: Salt Science Research Foundation, Chinese Academy of Sciences, Natural Science Foundation of Liaoning Province, Dalian Institute of Chemical Physics