DOI: https://doi.org/10.29363/nanoge.aohm.2019.010
Publication date: 8th January 2019
Organic and organohalide perovskite solar cells and photodetectors share several common electro-optical operating principles [1]. Both families of devices operate within the thin film, low finesse cavity limit and there are also commonalities in electrodes and ancillary layer materials and structures [2]. Generally speaking, photodetectors are optimized with respect to their external quantum efficiency (Responsivity) and noise characteristics under small reverse bias voltages as a function of frequency [3], and solar cells the maximum power that can be extracted under equilibrium conditions of AM1.5G illumination. In both cases, a clear understanding of photogeneration and extraction efficiency via simulation and measurement leads to informed design and robust structure-property relationships [4].
In my talk I will describe some of the most recent thinking in regard establishing these structure-property relationships for both organic and organohalide perovskite material systems. In particular, I will discuss how device architecture can be used to manipulate the photo-generated charge spatial profile and extraction efficiency, and explore the concept of creating narrowed spectral response via cavity enhancements and charge collection narrowing [5,6]. Finally, I will summarize new protocols recently established to solidify the emerging field of thin film photodetectors based upon a clear understanding of key electro-optical phenomena [3].
[1] Lin et al. Nature Photonics, 9, 106-112 (2015); Lin et al. Nature Photonics, 9, 687-694 (2015);
[2] Armin et al. ACS Photonics, 1(3), 173-181 (2014);
[3] Fang, et al. Nature Photonics, doi.org/ NPHOT-2018-06-00806B (2019);
[4] Stolterfoht, et al. Nature Communications, 7, 11944 (2016);
[5] Yazmaciyan et al. Advanced Optical Materials, In Press (2019);
[6] Armin et al. Nature Communications, 6, 6343 (2015).
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