The Synergism of DMSO and Diethyl Ether for Highly Reproducible and Efficient MA0.5FA0.5PbI3 Perovskite Solar Cells
Abstract
Composition and film quality of perovskite are crucial for the further improvement of perovskite solar cells (PSCs), including efficiency, reproducibility, and stability. Here, it is demonstrated that by simply mixing 50% of formamidinium (FA+) into methylammonium lead iodide (MAPbI3), a highly crystalline, stable phase, and compact, polycrystalline grain morphology perovskite is formed by using a solvent‐mediated phase transformation process via the synergism of dimethyl sulfoxide and diethyl ether, which shows long carrier lifetime, low trap state density, and a record certified 21.8% power conversion efficiency (PCE) in pure‐iodide, alkaline‐metal‐free MA0.5FA0.5PbI3 perovskite‐based PSCs. These PSCs show very high operational stability, with 85% PCE retention upon 1000 h 1 Sun intensity illumination. A 17.33% PCE module (6.5 × 7 cm2) is also demonstrated, attesting to the scalability of such devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 25, 2020
- Source ID
- 10.1002/aenm.202001300
Entities
People
- Hiroyuki Kanda
- Keith Gregory Brooks
- Min Chen
- Mohammad Khaja Nazeeruddin
- Nitin P Padture
- Rashid Zia
- Ruiyuan Hu
- Sachin Kinge
- Wenhao Li
- Xiao‐xin Gao
- Yi Zhang
- Yonghui Lee
- Yuanyuan Zhou
Organizations
- Brown University
- National Science Foundation
- Office of Naval Research
- Swiss Federal Institute of Technology in Lausanne
- Toyota
- United States Army