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Toward Electrically-Pumped Lasing in Organic-Inorganic Hybrid Perovskite Semiconductors

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[Technical Report, Final Report]

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The objective of this program is to establish the scientific basis needed to realize a hybrid perovskite laser diode. The past year focused on understanding the operation of perovskite light-emitting diodes at extreme current density. We have found that, under short 50 ns pulses with suitable thermal management, that we can achieve 1-5 kAcm2 current densities while maintaining external quantum efficiencies 1. This result is significant because it implies electrically-injected excitation density nearing what we know achieves lasing under optical excitation. In parallel with this development, we also developed an analytical model for ideal organic and perovskite laser diodes based on the argument that their intrinsic active layers necessitate operation in the bipolar space charge-limited current regime. We obtained rigorous analytical expressions for the threshold voltage and current density and identified fundamental limits for laser operation in the presence of parasitic annihilation and excited state absorption losses that should serve to guide the future of organic laser diode technology. We published 4 manuscripts in this reporting period, with 1 more in preparation and 1 provisional patent filing. Owing to a COVID-related delay in spending over the past year, we obtained a no cost extension to complete the objectives of this program and expect to achieve electrically-pumped lasing in the coming year.


Subject Categories:

  • Optics
  • Lasers and Masers
  • Electrical and Electronic Equipment

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[A, Approved For Public Release]