Electro-optical Considerations for Thin Film Solar Cells and Photodetectors
Paul Meredith a
a Department of Physics, Swansea University, UK, Singleton Park, University College, Sketty, Swansea SA2 8PR, Reino Unido, United Kingdom
Proceedings of International Conference on Advances in Organic and Hybrid Electronic Materials (AOHM19)
Dubrovnik, Croatia, 2019 March 17th - 20th
Organizers: Alejandro Briseno, Thuc-Quyen Nguyen and Natalie Stingelin
Invited Speaker, Paul Meredith, presentation 010
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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