Melt Processing of Operationally-Stable Perovskite Photovoltaic Films and Devices
Abstract
Flexible, light weight, durable and high-performance photovoltaic (PV) systems based on organic-inorganic perovskite (OIP) semiconductors are expected to provide critical opportunities for combat operations, where mobile and off-grid power can vastly improve battlefield effectiveness. However, air, humidity and thermal sensitivity, as well as degradation under illumination, all contribute to questionable reliability for current generation devices. While deeper scientific underpinnings for OIP stability are forming, important empirical factors promoting stability include: 1) large grain size within the OIP layer to reduce access of air/moisture to the film interior; 2) more two-(as opposed to three-) dimensional perovskite crystal lattices in order to enable incorporation of less volatile and more hydrophobic (i.e., effective for repelling moisture) cations within the framework; 3) control over interfacial reaction and decomposition pathways at the OIP absorber/electron ( or hole) transport layer interfaces; and 4) effective encapsulation to provide a "first line of defense" against prospective detrimental environmental agents such as moisture, air and UV light. This program has focused on demonstrating a novel film deposition approach-melt-processing-for Pb-based OIPs, which offers the prospects of addressing the above stability-promoting factors for PV absorber layers and providing a pathway for versatile high-throughput fabrication of potentially flexible PV devices.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 2021
- Accession Number
- AD1224138
Entities
People
- David B Mitzi
Organizations
- Duke University