Fig. 2 | Nature Communications

Fig. 2

From: Correct determination of charge transfer state energy from luminescence spectra in organic solar cells

Fig. 2

EL spectra and out-coupling factor of an OSC with and without semitransparent layer. EL spectra of a P3HT:PC61BM cell without (type A, see Fig. 1) and with a thin, semitransparent Ag layer on top (type B) together with the calculated radiant out-coupling factors \(\bar \gamma _{{\mathrm{OC}}}\). The more distinct peak with the additional semitransparent layer originates from the formation of an optical cavity what can be seen from the out-coupling factor

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