The effect of flower, seed and leaf extracts of Sophora alopecuroides plant on the performance of dye sensitive solar cells

Öz

Energy crises, the depletion of fossil fuels in the near future and the greenhouse effect are among the biggest problems in the world. Solar energy technologies come to the fore at the point of solution to these problems. Intensive research is being carried out on dye-sensitized solar cells (DSSCs), which is among the 3rd generation solar cell technologies. Although the efficiencies of DSSCs are lower than silicon-based solar cells, the performance of these cells can be improved with changes in the sensitizing. In this study, it was investigated how dyes obtained from the flower, seed and leaf parts of Sophora alopecuroides affect the efficiency of DSSCs. Mineralogical and morphological analyzes of titanium dioxide (TiO2) forming the photoanode layer were performed with X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD results confirmed the anatase phase and microcrystalline structure of TiO2. SEM images revealed the presence of tightly packed microspheres. Among the DSSCs produced, the cell sensitized with photoanode leaf dye showed the highest cell efficiency with 0.057.

Anahtar Kelimeler

• Dye-sensitized solar cell
• Sophora alopecuroides plant
• cell performance
• titanium dioxide

Acı meyan bitkisinin çiçek, tohum ve yapraklarından ekstrakte edilen boyaların BDGP’lerin performansına etkisi

Öz

Enerji krizleri, fosil yakıtların yakın gelecekte tükenecek olması ve sera gazı etkisi dünyanın en büyük sorunları arasında yer almaktadır. Bu sorunlara çözüm noktasında güneş enerjisi teknolojileri ön plana çıkmaktadır. 3. nesil güneş pili teknolojileri arasında yer alan boya duyarlı güneş pilleri (BDGP) üzerinde yoğun araştırmalar yapılmaktadır. BDGP’lerin verimleri silisyum tabanlı güneş pillerine kıyasla daha düşük olmasına rağmen hassaslaştırıcı boyada yapılacak değişikliklerle bu hücrelerin performansları geliştirilebilir. Bu çalışmada acı meyan (Sophora alopecuroides) bitkisinin çiçek, tohum ve yaprak kısımlarından ekstrakte edilmiş boyalarla duyarlılaştırılmış BDGP’lerin fotovoltaik performansları araştırıldı. Fotoanot katmanı oluşturan titanyum dioksit’in (TiO2) minerolojik ve morfolojik analizleri X-ışını difraksiyonu (XRD) ve taramalı elektron mikroskobu (SEM) ile gerçekleştirildi. XRD sonuçları TiO2’nin anataz fazını ve kristal yapısını doğruladı. SEM görüntüleri birbirine sıkıca paketlenmiş mikro kürecik yapının varlığını ortaya çıkardı. Üretilen BDGP’ler arasında en yüksek hücre verimini 0.057 ile fotoanodu yaprak boyasıyla duyarlılaştırılmış hücre gösterdi.

Anahtar Kelimeler

• Boya duyarlı güneş pili
• meyan kökü bitkisi
• hücre performansı
• titanyum dioksit

Kaynakça

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