Suppressing Nonradiative Recombination in Crown-Shaped Quantum Wells: Article No. 030305

Kwangwook Park, Gunwu Ju, Byung Na, Hyeong-Yong Hwang, Young-Dahl Jho, NoSoung Myoung, Sang-Youp Yim, Hyung-jun Kim, Yong Lee

Research output: Contribution to journalArticlepeer-review


We examined the structural and optical properties of a crown-shaped quantum well (CSQW) to suppress nonradiative recombination. To reduce carrier loss in defect traps at the well/barrier interface, the CSQW was designed to concentrate carriers in the central region by tailoring the bandgap energy. Temperature-dependent photoluminescence measurements showed that the CSQW had a high activation energy and low potential fluctuation. In addition, the long carrier lifetime of the CSQW at high temperatures can be interpreted as indicating a decrease in carrier loss at defect traps.
Original languageAmerican English
Number of pages4
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number3
StatePublished - 2018

NREL Publication Number

  • NREL/JA-5K00-71137


  • activation energy
  • band gap energy
  • carrier lifetime
  • defect traps
  • defects
  • high temperature
  • non-radiative recombinations
  • optical properties
  • potential fluctuations
  • semiconductor quantum wells
  • structural and optical properties
  • temperature dependent photoluminescences


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