Solid-phase hetero epitaxial growth of α-phase formamidinium perovskite
Journal Article
·
· Nature Communications
- Univ. of California, Los Angeles, CA (United States); Sungkyunkwan Univ., Suwon (Korea); University of California, Los Angeles
- Univ. of California, Los Angeles, CA (United States)
- Univ. of California, Los Angeles, CA (United States); Hanyang Univ., Seoul (Korea)
- Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of California, Irvine, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Conventional epitaxy of semiconductor films requires a compatible single crystalline substrate and precisely controlled growth conditions, which limit the price competitiveness and versatility of the process. We demonstrate substrate-tolerant nano-heteroepitaxy (NHE) of high-quality formamidinium-lead-tri-iodide (FAPbI3) perovskite films. The layered perovskite templates the solid-state phase conversion of FAPbI3 from its hexagonal non-perovskite phase to the cubic perovskite polymorph, where the growth kinetics are controlled by a synergistic effect between strain and entropy. The slow heteroepitaxial crystal growth enlarged the perovskite crystals by 10-fold with a reduced defect density and strong preferred orientation. This NHE is readily applicable to various substrates used for devices. The proof-of-concept solar cell and light-emitting diode devices based on the NHE-FAPbI3 showed efficiencies and stabilities superior to those of devices fabricated without NHE.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Oak Ridge Leadership Computing Facility (OLCF); Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- Ministry of Science, ICT and Future Planning (MSIT); National Research Foundation of Korea (NRF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725; EE0008751
- OSTI ID:
- 1695699
- Alternate ID(s):
- OSTI ID: 1827978
OSTI ID: 1775199
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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