Increase in internal quantum efficiency in small molecular oligothiophene: C60 mixed heterojunction solar cells by substrate heating

Increase in internal quantum efficiency in small molecular oligothiophene: C60 mixed heterojunction solar cells by substrate heating

We present small molecule solar cells with <em>α</em>,<em>ω</em>-bis-(dicyanovinylene)-sexithiophene: C<sub>60</sub> mixed heterojunctions, reaching power conversion efficiencies of 4.9±0.2%. We use substrate heating during deposition of the mixed layer to achieve...

Detaylı Bibliyografya
Asıl Yazarlar:	Wynands, D, Levichkova, M, Leo, K, Uhrich, C, Schwartz, G, Hildebrandt, D, Pfeiffer, M, Riede, M
Materyal Türü:	Journal article
Dil:	English
Baskı/Yayın Bilgisi:	American Institute of Physics 2010

Diğer Bilgiler
Özet:	We present small molecule solar cells with <em>α</em>,<em>ω</em>-bis-(dicyanovinylene)-sexithiophene: C<sub>60</sub> mixed heterojunctions, reaching power conversion efficiencies of 4.9±0.2%. We use substrate heating during deposition of the mixed layer to achieve an optimized morphology and show that this significantly improves the internal quantum efficiencies (IQEs) to values approaching 70%. By optical modeling, we evaluate the amount of loss due to absorption in inactive layers and show that IQE of the active layer itself is about 80%. <em>© 2010 American Institute of Physics.</em>