Reduced impurity-driven defect states in anodized nanoporous Nb2O5: the possibility of improving performance of photoanodes

Rozina Abdul Rani; Ahmad Sabirin Zoolfakar; Jian Zhen Ou; Rosmalini Ab. Kadir; Hussein Nili; Kay Latham; Sharath Sriram; Madhu Bhaskaran; Serge Zhuiykov; Richard B. Kaner; Kourosh Kalantar-zadeh

doi:10.1039/C3CC42998A

Reduced impurity-driven defect states in anodized nanoporous Nb₂O₅: the possibility of improving performance of photoanodes†

Rozina Abdul Rani,^a Ahmad Sabirin Zoolfakar,^a Jian Zhen Ou,*^a Rosmalini Ab. Kadir,^a Hussein Nili,^a Kay Latham,^b Sharath Sriram,^a Madhu Bhaskaran,^a Serge Zhuiykov,^c Richard B. Kaner^ad and Kourosh Kalantar-zadeh*^a

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* Corresponding authors

^a School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria 3001, Australia
E-mail: kourosh.kalantar@rmit.edu.au, jianzhen.ou@rmit.edu.au

^b School of Applied Sciences, Applied Chemistry, RMIT University, Melbourne, Victoria 3001, Australia

^c Materials Science and Engineering Division, CSIRO, Highett 3190, Victoria, Australia

^d Department of Chemistry and Biochemistry, Department of Materials Science and Engineering, and California NanoSystems Institute, University of California, Los Angeles, California 90095, USA

Abstract

Anodized nanoporous Nb₂O₅ films are synthesized using two different types of electrolyte compositions onto transparent conductive glasses and their impurities induced during the anodization process are assessed. These films are incorporated as photoanodes in dye sensitized solar cells (DSSCs). The one with no traces of impurity-driven defects exhibits higher current density and longer electron lifetimes, and consequently, an improvement in photoconversion efficiencies compared to the one that contains impurities.

Chemical Communications

Reduced impurity-driven defect states in anodized nanoporous Nb₂O₅: the possibility of improving performance of photoanodes†

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Reduced impurity-driven defect states in anodized nanoporous Nb₂O₅: the possibility of improving performance of photoanodes

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Chemical Communications