Solar Energy Conversion by the Regular Array of TiO2Nanotubes Anchored with ZnS/CdSSe/CdS Quantum Dots Formed by Sequential Ionic Bath Deposition | Zendy

Soo-Jeong Park | Zendy; Yeonju Seo | Zendy; Myung Soo Kim | Zendy; Seonghoon Lee | Zendy

Open Access

Solar Energy Conversion by the Regular Array of TiO₂Nanotubes Anchored with ZnS/CdSSe/CdS Quantum Dots Formed by Sequential Ionic Bath Deposition

Author(s) -

Soo-Jeong Park,

Yeonju Seo,

Myung Soo Kim,

Seonghoon Lee

Publication year - 2013

Publication title -

bulletin of the korean chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.237

H-Index - 59

eISSN - 1229-5949

pISSN - 0253-2964

DOI - 10.5012/bkcs.2013.34.3.856

Subject(s) - materials science , quantum dot , solar cell , electrode , electrolyte , ionic bonding , band gap , energy conversion efficiency , optoelectronics , photoelectrochemistry , anodizing , nanotechnology , chemical engineering , chemistry , electrochemistry , ion , composite material , organic chemistry , aluminium , engineering

The photoanode electrode of TiO2 nanotubes (NTs) anchored with ZnS/CdSSe/CdS quantum dots (QDs) was prepared by anodization of Ti metal and successive ionic layer adsorption and reaction (SILAR) procedure. The tuning of the band gap of CdSSe was done with controlled composition of Cd, S, or Se during the SILAR. A ladder-like energy structure suitable for carrier transfer was attained with the photoanode electrode. The power conversion efficiency (PCE) of our solar cell fabricated with the regular array of TiO2 NTs anchored with CdSSe/CdS or CdSe/CdS QDs [i.e., (CdSSe/CdS /TiO2NTs) or (CdSe/CdS /TiO2NTs )] was PCE = 3.49% and 2.81% under the illumination at 100 mW/cm, respectively. To protect the photocorrosion of our solar cell from the electrolyte and to suppress carrier recombination, ZnS was introduced onto CdSSe/CdS. The PCE of our solar cell with the structure of a photoanode electrode, (ZnS/CdSSe/CdS/TiO2 NTs/Ti) was 4.67% under illumination at 100 mW/cm.

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