Bae, Hyojung Park, Jun-Beom Fujii, Katsushi Lee, Hyo-Jong Lee, Sang-Hyun Ryu, Sang-Wan Lee, June Key Ha, Jun-Seok 2024-01-20T01:34:09Z 2024-01-20T01:34:09Z 2021-09-01 2017-04-15 0169-4332 https://pubs.kist.re.kr/handle/201004/122846 In this study, the effects of the number of quantum well (QW) pairs on the photoelectrochemical (PEC) properties of InGaN/GaN multi-QW structures (MQWs) were investigated. MQW samples were grown using metal-organic chemical vapor deposition, and their structural characteristics were confirmed by X-ray diffraction measurements. The photoluminescence measurements revealed that the optical properties of MQWs may be related to the PEC properties. The cyclic voltammetry data revealed that the saturated photocurrent density increased with increasing number of QW pairs; the photocurrent density of MQW5 was twice that of an nGaN reference. However, in the chronoamperometry measurement of the photoanode stability, MQWs with 3 QWs displayed the highest photocurrent stability, although the saturated photocurrent density was highest for MQW5. This was also confirmed by field-emission scanning electron microscopy of the surface morphology after PEC measurements. The stability and photocurrent density may be attributed to the quality of crystallinity of the MQWs. (C) 2016 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV GENERATION NANOWIRES The Effect of the number of InGaN/GaN pairs on the photoelectrochemical properties of InGaN/GaN multi quantum wells Article 10.1016/j.apsusc.2016.12.049 1 APPLIED SURFACE SCIENCE, v.401, pp.348 - 352 APPLIED SURFACE SCIENCE 401 348 352 scie scopus 000394074300041 2-s2.0-85009174864 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article GENERATION NANOWIRES Hydrogen generation InGaN/GaN Multi quantum well Photoelectrochemistry Water splitting