%0 Journal Article %1 Schembri_2021 %A Schembri, Tim %A Kim, Jin Hong %A Liess, Andreas %A Stepanenko, Vladimir %A Stolte, Matthias %A Würthner, Frank %D 2021 %I Wiley %J Advanced Optical Materials %K myown %N 15 %P 2100213 %R 10.1002/adom.202100213 %T Semitransparent Layers of Social Self-Sorting Merocyanine Dyes for Ultranarrow Bandwidth Organic Photodiodes %U https://doi.org/10.1002%2Fadom.202100213 %V 9 %X Two dipolar merocyanines consisting of the same π-conjugated chromophore but different alkyl substituents adopt very different packing arrangements in their respective solid state with either H- or J-type exciton coupling, leading to ultranarrow absorption bands at 477 and 750 nm, respectively, due to exchange narrowing. The social self-sorting behavior of these push-pull chromophores in their mixed thin films is evaluated and the impact on morphology as well as opto-electronical properties is determined. The implementation of this well-tuned two-component material with tailored optical features allows to optimize planar heterojunction organic photodiodes with fullerene ​(C60) with either dual or single wavelength selectivity in the blue and NIR spectral range with ultranarrow bandwidths of only 11 nm (200 cm−1) and an external quantum efficiency of up to 18% at 754 nm under 0 V bias. The application of these photodiodes as low-power consuming heart rate monitors is demonstrated by a reflectance-mode photoplethysmography (PPG) sensor.

@article{Schembri_2021, abstract = {Two dipolar merocyanines consisting of the same π-conjugated chromophore but different alkyl substituents adopt very different packing arrangements in their respective solid state with either H- or J-type exciton coupling, leading to ultranarrow absorption bands at 477 and 750 nm, respectively, due to exchange narrowing. The social self-sorting behavior of these push-pull chromophores in their mixed thin films is evaluated and the impact on morphology as well as opto-electronical properties is determined. The implementation of this well-tuned two-component material with tailored optical features allows to optimize planar heterojunction organic photodiodes with fullerene ​(C60) with either dual or single wavelength selectivity in the blue and NIR spectral range with ultranarrow bandwidths of only 11 nm (200 cm−1) and an external quantum efficiency of up to 18% at 754 nm under 0 V bias. The application of these photodiodes as low-power consuming heart rate monitors is demonstrated by a reflectance-mode photoplethysmography (PPG) sensor.}, added-at = {2021-09-01T10:05:53.000+0200}, author = {Schembri, Tim and Kim, Jin Hong and Liess, Andreas and Stepanenko, Vladimir and Stolte, Matthias and Würthner, Frank}, biburl = {https://www.bibsonomy.org/bibtex/2216d35c1d0cd2e7d958e189327ad84bc/wuerthner_group}, doi = {10.1002/adom.202100213}, interhash = {085584a141af9181e41bbadceed5ef3c}, intrahash = {216d35c1d0cd2e7d958e189327ad84bc}, journal = {Advanced Optical Materials}, keywords = {myown}, month = may, number = 15, pages = 2100213, publisher = {Wiley}, timestamp = {2021-09-01T10:05:53.000+0200}, title = {Semitransparent Layers of Social Self-Sorting Merocyanine Dyes for Ultranarrow Bandwidth Organic Photodiodes}, url = {https://doi.org/10.1002%2Fadom.202100213}, volume = 9, year = 2021 }