P3HT: PCBM Tabanlı Organik Güneş Hücrelerinin Opteoelektronik Özelliklerinin Aktif Katman Kalınlığına Bağlı İncelenmesi

Bu çalışmada ITO/PEDOT:PSS/P3HT:PCBM/Al organik güneş hücrelerinin (OSC) üretimi ve optoelektronik karakterizasyon süreci üzerine yapılan araştırmanın sonuçlarını sunmaktadır. OSC'ler, 70, 110, 140, 175 ve 190 nm P3HT:PCBM aktif tabaka kalınlıklarına sahip olacak şekilde açık hava ortamında üretildi. Güneş hücrelerinin diyot özellikleri karanlıkta yapılan akım-gerilim (I-V) ölçümleri kullanılarak incelenmiştir. Soğurma karakteristikleri optik geçirgenlik spektroskopisi kullanılarak incelenmiş ve her numune için yasak enerji bant aralığı (Eg) hesaplanmıştır. Her bir güneş hücresi için hücre parametreleri, AM 1.5 güneş radyasyonu altında akım yoğunluğu-voltaj (J-V) ölçümleri kullanılarak incelenmiş ve önemli güneş hücresi parametreleri hesaplanmıştır. Güneş hücrelerinin FF değerinin 0,3239 ile 0,3409 arasında diyot idealite faktörü (n) düştükçe arttığı gözlendi. PCE'nin en yüksek değerinin 140 nm P3HT: PCBM kalınlığına sahip hücreye ait 0,59 olduğu bulunmuştur.

Anahtar Kelimeler:

Güneş Hücresi, P3HT, PCBM, Elektriksel Karakterizasyon, Optik Karakterizasyon

Investigation of Dependence of Optoelectronic Properties of P3HT: PCBM Based Organic Solar Cells on Active Layer Thickness

This paper presents the production and results of optoelectronic characterization process for ITO/PEDOT:PSS/P3HT:PCBM/Al organic solar cells (OSC). OSCs were produced in open air environment with various P3HT:PCBM active layer thicknesses of 70, 110, 140, 175 and 190 nm. The diode properties of the solar cells in the dark have been investigated by using current-voltage (I-V) measurements. The absorption characteristics have been investigated by using transmission spectroscopy, and optical band gap energy (Eg) for each sample has been calculated. Solar cell parameters for each solar cell has been investigated by using current density-voltage (J-V) measurements under AM 1.5 solar raditation, and important solar cell parameters have been calculated. It was observed that fill factor (FF) value of the solar cells increase between 0.3239 and 0.3409 with decreasing diode ideality factor (n) value. The highest value of PCE was found to be 0.59, which belongs to the cell having 140 nm P3HT:PCBM thickness.

Keywords:

Solar Cell, P3HT, PCBM, Electrical Characterization, Optical Characterization,

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