Managing Green Emission in Coupled InGaN QW−QDs Nanostructures via Nanoengineering
Managing Green Emission in Coupled InGaN QW−QDs Nanostructures via Nanoengineering
复制标题
通过纳米工程管理耦合 InGaN QW–QD 纳米结构的绿色排放
DOI:
10.1021/acs.jpcc.7b07826
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发表时间:
2017
影响因子:
3.7
通讯作者:
S. J. Xu
中科院分区:
文献类型:
--
作者:
Z.C. Su;Z. L. Wang;J.D. Yu;Y. Yi;M. Z. Wang;L. Wang;Y. Luo;J. N. Wang;S. J. Xu
By utilizing and designing coupled InGaN QW–QDs nanostructures as active layer, we show a demonstration of significant enhancement of green emission in the hybrid nanostructure with a 4.5 nm GaN barrier layer at high temperatures. Such enhancement is ascribed to temperature-dependent phonon-assisted tunneling of excitons from QW to QDs and suppression of nonradiative recombination of excitons localized in the QDs layer in the sample with a 4.5 nm barrier layer. This study shall be useful for optimization design of high-efficiency InGaN-based green LEDs and also could shed some light on the complicated internal luminescence mechanisms in InGaN QW–QDs hybrid nanostructures.