A Shockley-Type polymer
- Charge extraction rate in solar cells made of blends of electron donating/accepting organic semiconductors is typically slow due to their low charge carrier mobility. This sets a limit on the active layer thickness and has hindered the industrialization of organic solar cells (OSCs). Herein, charge transport and recombination properties of an efficient polymer (NT812):fullerene blend are investigated. This system delivers power conversion efficiency of >9% even when the junction thickness is as large as 800 nm. Experimental results indicate that this material system exhibits exceptionally low bimolecular recombination constant, 800 times smaller than the diffusion-controlled electron and hole encounter rate. Comparing theoretical results based on a recently introduced modified Shockley model for fill factor, and experiments, clarifies that charge collection is nearly ideal in these solar cells even when the thickness is several hundreds of nanometer. This is the first realization of high-efficiency Shockley-type organic solar cellsCharge extraction rate in solar cells made of blends of electron donating/accepting organic semiconductors is typically slow due to their low charge carrier mobility. This sets a limit on the active layer thickness and has hindered the industrialization of organic solar cells (OSCs). Herein, charge transport and recombination properties of an efficient polymer (NT812):fullerene blend are investigated. This system delivers power conversion efficiency of >9% even when the junction thickness is as large as 800 nm. Experimental results indicate that this material system exhibits exceptionally low bimolecular recombination constant, 800 times smaller than the diffusion-controlled electron and hole encounter rate. Comparing theoretical results based on a recently introduced modified Shockley model for fill factor, and experiments, clarifies that charge collection is nearly ideal in these solar cells even when the thickness is several hundreds of nanometer. This is the first realization of high-efficiency Shockley-type organic solar cells with junction thicknesses suitable for scaling up.…
Verfasserangaben: | Ardalan ArminORCiD, Zhiming Chen, Yaocheng JinORCiD, Kai ZhangORCiD, Fei HuangORCiD, Safa ShoaeeORCiDGND |
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DOI: | https://doi.org/10.1002/aenm.201701450 |
ISSN: | 1614-6832 |
ISSN: | 1614-6840 |
Titel des übergeordneten Werks (Englisch): | Advanced energy materials |
Untertitel (Deutsch): | Fullerene solar cell |
Verlag: | Wiley-VCH |
Verlagsort: | Weinheim |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 08.11.2018 |
Erscheinungsjahr: | 2018 |
Datum der Freischaltung: | 07.01.2022 |
Freies Schlagwort / Tag: | charge transport; non-Langevin recombination; organic solar cells; thick junctions |
Band: | 8 |
Ausgabe: | 7 |
Seitenanzahl: | 9 |
Fördernde Institution: | Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Natural Science Foundation of ChinaNational Natural Science Foundation of China [21520102006, 91633301] |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer Review: | Referiert |