Perovskite laser diode operates under direct current at 8 K
This digest was compiled by AI from multiple sources — links to the originals are below.
Researchers demonstrated a perovskite polariton laser diode operating under direct current at 8 K, achieving lasing at 65 μA. The device integrates a CsPbBr3 microplate with carbon nanotube electrodes in an optical microcavity, enabling polariton lasing in the strong coupling regime.
Device Architecture
The laser diode uses a solution-grown CsPbBr3 microplate integrated with chemically inert single-walled carbon nanotube (SWCNT) electrodes. The structure is embedded into an optical microcavity, forming a p–i–n diode upon cooling to 8 K. This design facilitates balanced carrier injection at high current densities.
Lasing Performance
At a constant current of 65 μA, the microcavity diode operates in the strong coupling regime and exhibits polariton lasing. The threshold current is significantly lower than previous electrically pumped perovskite devices. The achievement marks the first direct-current perovskite polariton laser diode.
Significance and Context
Previous efforts for electrically pumped perovskite lasers relied on indirect pumping or optical excitation. This work overcomes the challenge of achieving lasing under direct electrical injection. The result opens a path toward compact, solution-processed laser diodes for integrated photonics.
What's Next
The team plans to explore room-temperature operation by optimizing the cavity design and materials. It remains unclear whether the device can achieve continuous-wave lasing at higher temperatures.
1 source
Perovskite laser diode operates under direct current at 8 K