The Effect of Copper Doped TiO2 Photoanodes on Dye Sensitized Solar Cells Performance

Abstract

In this study, Cu doped TiO2 nanoparticles with different ratios are produced and are employed as semiconductor materials of photoanode to improve the photovoltaic performance of dye sensitized solar cells (DSSCs). X-ray difractometer (XRD), scanning electron microscope (SEM), and UV-vis spektrofotometre analiysis are used to characterize the influence of copper dopant with different concentrations on the TiO2 photoanodes. Also, the effect of dopant on photovoltaic performance of DSSCs were analyzed by current-voltage analysis systems. XRD and SEM analysis revealed that Cu ions settled in TiO2 structure. According to obtained photovoltaic results, the ideal Cu concentration of 1.0 at.%, the current density rised from 10.83 to 13.36 mA.cm-2, power conversion efficiencies increased from 4.59% up to 5.26% as compared to the bare DSSC. The significantly enhanced current density of the produced DSSCs was found to be related to the ideal Cu dopant amount and dye hold ability in Cu doped TiO2 photoanode. These results showed that the doping of ideal copper ratio in DSSCs an effective way to increase in the conversion efficiency of DSSCs.

Keywords

• DSSCs
• Titanium Dioxide (TiO2)
• Cu Doping
• Solar Cells Efficiency

Bakır Katkılı TiO2 Fotoanotların Boya Duyarlı Güneş Pilleri Performansı Üzerindeki Etkisi

Öz

Bu çalışmada, farklı oranlarda (Cu) katkılı TiO2 nanoparçacıkları hazırlandı ve hazırlanan bu nanoparçacıklar boya duyarlı güneş pilleri (BDGP)’nde yarıiletken fotoanot olarak kullanıldı. Katkısı yapılan farklı oranlarda ki Cu iyonlarının TiO2 fotoanotları üzerindeki etkisini analiz etmek amacıyla X-ışını difraktometresi (XRD), taramalı elektron mikroskobu (SEM) ve UV-vis spektrofotometre analizleri kullanılmıştır. Ayrıca yapılan Cu katkısının BDGP performansı üzerindeki etkisini belirlemek için akım-gerilim analiz sistemleri kullanılmıştır. Yapılan XRD ve SEM analizlerinde Cu iyonlarının TiO2 yapısına yerleştiği anlaşılmıştır. Elde edilen fotovoltaik sonuçlara göre ise, saf TiO2 BDGP ile karşılaştırıldığında ideal katkı oranının % 1’lik Cu katkı oranı olduğu ve bu katkı oranı ile akım yoğunluğunun 10.83 mA.cm-2 değerinden 13.36 mA.cm-2 değerine yükseldiği, pillerin güç dönüşüm veriminin ise % 4.59 değerinden % 5.26 değerine ulaştığı saptanmıştır. Üretilen BDGP’inde akım yoğunluğunda ki kayda değer bu artış ideal Cu oranının katkısı ve Cu katkılı fotoanodun boyayı tutma kabiliyetini arttırması ile ilgilidir. Elde edilen bu sonuçlar BDGP’nde Cu iyonlarının ideal katkısı, üretilen pillerin verim değerini arttırma konusunda etkili bir yöntem olduğunu göstermektedir.

Anahtar Kelimeler

• BDGP
• Titanyum Dioksit (TiO2)
• Cu katkısı
• Güneş Pili Verimi

Kaynakça

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