Light Amplification in Fe-Doped CsPbBr 3 Crystal Microwire Excited by Continuous-Wave Laser.
Shuangyang ZouXiaoan ZhaoJing LyuWenze OuyangRuibin LiuShenghua XuPublished in: The journal of physical chemistry letters (2023)
Electrically pumped halide perovskite laser diodes remain unexplored, and it is widely acknowledged that continuous-wave (CW) lasing will be a crucial step. Here, we demonstrate room-temperature amplified spontaneous emission of Fe-doped CsPbBr 3 crystal microwire excited by a CW laser. Temperature-dependent photoluminescence spectra indicate that the Fe dopant forms a shallow level trap states near the band edge of the lightly doped CsPbBr 3 microcrystal. Pump intensity-dependent time-resolved PL spectra show that the introduced Fe dopant level makes the electron more stable in excited states, suitable for the population inversion. The emission peak intensity of the lightly Fe-doped microwire increases nonlinearly above a threshold of 12.3 kW/cm 2 under CW laser excitation, indicating a significant light amplification. Under high excitation, the uniform crystal structure and surface outcoupling in Fe-doped perovskite crystal microwires enhanced the spontaneous emission. These results reveal the considerable promise of Fe-doped perovskite crystal microwires toward low-cost, high-performance, room-temperature electrical pumping perovskite lasers.
Keyphrases
- room temperature
- metal organic framework
- visible light
- quantum dots
- energy transfer
- ionic liquid
- highly efficient
- aqueous solution
- solar cells
- solid state
- low cost
- crystal structure
- magnetic resonance imaging
- machine learning
- single cell
- big data
- high speed
- molecular dynamics
- genome wide
- high resolution
- magnetic resonance
- electron transfer