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. 2017 Jun 5;8:15421. doi: 10.1038/ncomms15421

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(a) Normalized EQE spectra of several tetraphenyl dipyranylidene:fullerene (TPDP:C₆₀) detectors at short circuit. The reference sample () with minimal interference effects has negligible absorption for wavelengths above 700 nm. For the cavity-enhanced devices, the resonance wavelength is varied from 810 to 1,550 nm by a thickness variation of both transport layers (∇) — and for selected detectors also by a thickness variation of the TPDP:C₆₀ blend (Δ). (b) Chemical structures of the blend constituents.

Inline graphic — (a) Normalized EQE spectra of several tetraphenyl dipyranylidene:fullerene (TPDP:C₆₀) detectors at short circuit. The reference sample () with minimal interference effects has negligible absorption for wavelengths above 700 nm. For the cavity-enhanced devices, the resonance wavelength is varied from 810 to 1,550 nm by a thickness variation of both transport layers (∇) — and for selected detectors also by a thickness variation of the TPDP:C₆₀ blend (Δ). (b) Chemical structures of the blend constituents.