Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 7, Pages 2510-2517Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c00593
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [51961145101, 51972118, 51722202]
- Fundamental Research Funds for the Central Universities [D2190980]
- Guangdong Provincial Science & Technology Project [2018A050506004]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]
- RFBR [19-52-80003]
Ask authors/readers for more resources
Doping is able to create novel optoelectronic properties of halide perovskites, and the involved mechanism of efficient emission is still a challenge. Herein Mn2+ substitution into 2D layered perovskites (C8H20N2)PbBr4 was investigated, demonstrating broad-band orange-red emission originating from the T-4(1) -> (6)A(1) transition of Mn2+ dopant. The photoluminescence quantum yield (PLQY) of Mn2+ emission is up to 60.8% related to the energy transfer in coupled states. We verify that an actual Mn2+ dopant as low as 0.476% reaches a high PLQY, whereas the nominal adding amount is 0.8 as the Mn2+/Pb2+ ratio. The small activation energy (similar to 6.72 meV) between the Mn2+ d state and the trap state accounts for this highly efficient energy transfer and photoluminescence. The proposed luminescence mechanism in Mn2+-doped 2D halide perovskites would provide unique insights into the doping design toward high-performance luminescence materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available