Enhanced photocurrent response in photocells made with platinum-poly-yne/C60 blends by photoinduced electron transfer

A. Köhler*, H. F. Wittmann, R. H. Friend, M. S. Khan, J. Lewis

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

100 اقتباسات (Scopus)

ملخص

We report photocurrent and photoluminescence measurements on blends of the organometallic polymer Pt-poly-yne and C60. Due to efficient intersystem crossing, triplet excitons with a binding energy of at least 0.8 eV are created after photoexcitation of Pt-poly-yne. We find that electrons are transferred from Pt-poly-yne onto C60 by efficient ionization of the triplet exciton. This process gives rise to a photocurrent quantum yield of up to 1-2% in photocells fabricated in a layer structure of indium-tin oxide (ITO)/Pt-poly-yne and 7 wt.% C60/aluminium. Evidence for the ionization of the strongly bound triplet excitons is provided by studies of luminescence in the blends. There is only partial quenching of the singlet emission band, but complete quenching of the triplet emission band, and the lifetime of the triplet emission at room temperature is reduced from 2 to 0.1 μs upon addition of 7 wt.% C60.

اللغة الأصليةEnglish
الصفحات (من إلى)147-150
عدد الصفحات4
دوريةSynthetic Metals
مستوى الصوت77
رقم الإصدار1-3
المعرِّفات الرقمية للأشياء
حالة النشرPublished - فبراير 1996

ASJC Scopus subject areas

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  • ???subjectarea.asjc.2500.2506???
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