Self‐Assembly of 0D/3D Perovskite Bi‐Layer from a Micro‐Emulsion Ink
Abstract
2D/3D bilayer perovskite synthesized using sequential deposition methods has shown effectiveness in enhancing the stability of perovskite solar devices. However, these approaches present several limitations such as uncontrolled chemical processes, disordered interfacial states, and microscale heterogeneities that can chemically, structurally, and electronically compromise the performance of solar modules. Here, this work demonstrates an emulsion‐based self‐assembly approach using natural lipid biomolecules in a nonionic solution system to form a 0D/3D bilayer structure. The new capping layer is composed of 0D‐entity nanoparticles of perovskite encapsulated by a hydrophobic lipid membrane, analogous to a cell structure, formed through a molecular self‐assembly process. This 0D layer provides a strong water repellent characteristics, optimum interface microstructure, and excellent homogeneity that drives significant enhancement in stability. Solar modules with a large active area of 70 cm2 fabricated using films comprising of 0D/3D bilayer structure are found to show consistent efficiency of >19% for 2800 h of continuous illumination in the air (60% relative humidity). This emulsion‐based self‐assembly approach is expected to have a transformative impact on the design and development of stable perovskite‐based devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 11, 2023
- Source ID
- 10.1002/aenm.202300570
Entities
People
- Dong Yang
- Haodong Wu
- Jungjin Yoon
- Kai Wang
- Ke Wang
- Luyao Zheng
- Shashank Priya
- Tao Ye
- Yuchen Hou
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Pennsylvania State University
- United States Department of Energy