Passivation of degradation path enables high performance perovskite nanoplatelet lasers with high operational stability

Abstract

MAPbI 3 perovskite has attracted widespread interests for developing low-cost near infrared semiconductor gain media. However, it faces the instability issue under operation conditions, which remains a critical challenge. It is found that the instability of the MAPbI 3 nanoplatelet laser comes from the thermal-induced degradation progressing from the surface defects towards neighboring regions. By using PbI 2 passivation, the defect-initiated degradation is significantly suppressed and the nanoplatelet degrades in a layer-by-layer way, enabling the MAPbI 3 laser to sustain for 4500 s ( 2.7 × 10 7 pulses ), which is nearly three times longer than that of the nanoplatelet laser without passivation. Meanwhile, the PbI 2 passivated MAPbI 3 nanoplatelet laser with the nanoplatelet cavity displays a maximum quality factor up to ∼ 7800 , the highest reported for all MAPbI 3 nanoplatelet cavities. Furthermore, a high stability MAPbI 3 nanoplatelet laser that can last for 8500 s ( 5.1 × 10 7 pulses ) is demonstrated based on a dual passivation strategy, by retarding the defect-initiated degradation and surface-initiated degradation simultaneously. This work provides in-depth insights for understanding the operating degradation of perovskite lasers, and the dual passivation strategy paves the way for developing high stability near infrared semiconductor laser media.

Detecting Visible to Near-Infrared II Light via CsPbBr3 Nanocrystals/Y6 Heterojunctions

“…The advent of perovskite materials, renowned for their outstanding optoelectronic properties, has led to diverse applications across various fields, including high-performance solar cells and advanced photodetectors (PDs). − Perovskite materials can be broadly categorized into organic–inorganic hybrid perovskites and all-inorganic perovskite. Among these, organic–inorganic hybrid perovskites are prone to decay in moist environments due to their organic components.…”

Efficient heat dissipation perovskite lasers using a high-thermal-conductivity diamond substrate

“…Hampered by the lower mobilities and lower damage thresholds of organic semiconductors compared with their inorganic counterparts, electrically driven solution-processable lasers comprise a long-standing challenge in laser research [10,11]. Lead halide perovskite semiconductors have significantly progressed in solution-processed optoelectronic devices [12][13][14][15][16][17][18]. Long diffusion length, low trap density, and high charge carrier mobility of perovskites have turned these semiconductors into promising candidates for developing electrically driven solution processable lasers [19][20][21].…”