Preprint Article Version 1 This version is not peer-reviewed

Carrier Dynamics in InGaN/GaN on the Basis of Different In Concentrations

Version 1 : Received: 26 March 2019 / Approved: 27 March 2019 / Online: 27 March 2019 (09:10:51 CET)

A peer-reviewed article of this Preprint also exists.

Ye, Z.T.; Nguyen, H.T.; Feng, S.-W.; Wang, H.-C.; Chou, H.-L. Carrier Dynamics in InGaN/GaN on the Basis of Different In Concentrations. Appl. Sci. 2019, 9, 2279. Ye, Z.T.; Nguyen, H.T.; Feng, S.-W.; Wang, H.-C.; Chou, H.-L. Carrier Dynamics in InGaN/GaN on the Basis of Different In Concentrations. Appl. Sci. 2019, 9, 2279.

Journal reference: Appl. Sci. 2019, 9, 2279
DOI: 10.3390/app9112279

Abstract

InGaN/GaN samples grown on c-plane sapphire substrate with different In concentrations by metal organic chemical vapor deposition are demonstrated. The subsequent capping GaN layer growth opens a possibility for dislocation reduction due to the lateral strain relaxation in growth geometry. We present the further growth optimization and innovative characterization of InGaN layers overgrown on different structures with varying In concentrations. The photoelectrical and optical properties of the InGaN layers with or without capping GaN layer were investigated by time-resolved picosecond transient grating and temperature dependence photoluminescence. We note a 10-fold increase in carrier lifetime in the InGaN layers when the sample structure changes from PIN to single InGaN layer.

Subject Areas

carrier dynamics; InGaN; four-wave maxing; solar cell; transient grating

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