Green light-emitting diodes with InGaN/GaN multiple quantum well structures: Time-resolved photoluminescence, emission dynamics and related studies

Zhe Chuan Feng, Xiaodong Jiang, Yueh Chien Lee, Hao-Chung Kuo, Lingyu Wan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To explore the mechanism, breakthrough the current bottleneck and overcome the efficiency droop from green InGaN/GaN multiple quantum wells (MQWs) light-emitting diodes (LEDs). The photoluminescence properties and carrier dynamics of green InGaN/GaN MQW LEDs are investigated by temperature-dependent photoluminescence (PL) from 10 K to 300 K and time-resolved PL (TRPL) measurements at 10 K in our new-built lab. With increasing temperature, a blue shift of PL behavior is attributed to band-tail states formed in local potential minima resembling In-rich clusters. The energy-dependent TRPL experiments are measured at 10 K to study the carrier dynamics in the MQWs. The results show that the PL slow decays for the low-energy side are much slower than the high-energy side. The depth of carrier localization is obtained by fitting the reduced slow decay time with the emission energy increasing. All the results indicate that the PL peak is related to localized radiative recombination.

Original languageEnglish
Title of host publication2016 5th International Symposium on Next-Generation Electronics, ISNE 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509024391
DOIs
StatePublished - 12 Aug 2016
Event5th International Symposium on Next-Generation Electronics, ISNE 2016 - Hsinchu, Taiwan
Duration: 4 May 20166 May 2016

Publication series

Name2016 5th International Symposium on Next-Generation Electronics, ISNE 2016

Conference

Conference5th International Symposium on Next-Generation Electronics, ISNE 2016
CountryTaiwan
CityHsinchu
Period4/05/166/05/16

Keywords

  • InGaN/GaN MQWs
  • TRPL
  • carrier dynamics
  • emission properties

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    Feng, Z. C., Jiang, X., Lee, Y. C., Kuo, H-C., & Wan, L. (2016). Green light-emitting diodes with InGaN/GaN multiple quantum well structures: Time-resolved photoluminescence, emission dynamics and related studies. In 2016 5th International Symposium on Next-Generation Electronics, ISNE 2016 [7543386] (2016 5th International Symposium on Next-Generation Electronics, ISNE 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISNE.2016.7543386