Specific of a photocurrent in GaN-based photoelectrochemical cell

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Marchenko, O.N.^1 ; Ermakov, I.A.^1 ; Puzyk, M.V.^1,2 ; Kovalev, D.S.^1 ; Ivanova, S.A.^1 ; Papchenko, B.P.^1 ; Usikov, A.S.^1,3 ; Chernyakov, A.E.^4

University ITMO, Kronverkskiy pr. 49, St. Petersburg

197101, Russia^1

Herzen University, Nab. r. Moyki 48, St. Petersburg

194186, Russia^2

Nitride Crystals Inc., 181 E Industry Court, Deer Park

NY

11729, United States^3

Submicron Heterostructures for Microelectronics Research and Engineering Center, RAS, 26 Polytekhnicheskaya Str., St. Petersburg

194021, Russia^4

关键词: Current stabilization;    GaN based;    LED light source;    Neutral salts;    Transient time;    Working electrode;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012108/pdf
DOI  :  10.1088/1742-6596/741/1/012108

来源: IOP

【 摘 要 】

An influence of various parameters of a photoelectrochemical cell (PECC) having a GaN working electrode on the photocurrent was studied. Type of the aqua electrolyte (alkaline (KOH)-, neutral salt (Na2SO4)- and acid (H2SO4)- based electrolytes) influences on transient time for the photocurrent stabilization. A transient time for the photo current stabilization was observed under illumination by the UV LED light sources. The shortest transient time and the highest photocurrent were observed in the alkaline-based electrolyte (∼0.5M KOH) with n- GaN working electrodes (ND-NA=(3-5)×1016cm-3). PECC with electrolytes based on sodium sulfate and sulfuric acid demonstrated longer transient time (up to ten minutes) for the photocurrent stabilization and smaller photocurrent.