Durgaryan, Ranush and Simokaitiene, Jurate and Volyniuk, Dmytro and Bezvikonnyi, Oleksandr and Danyliv, Yan and Kim, Byeong Jo and Woon, Kai Lin and Sini, Gjergji and Boschloo, Gerrit and Grazulevicius, Juozas Vidas (2022) Enhancement of hole extraction efficiency of dibenzothiophenes by substitution engineering: Toward additive-free perovskite solar cells with power conversion efficiency exceeding 20%. Solar RRL, 6 (7). ISSN 2367-198X, DOI https://doi.org/10.1002/solr.202200128.
Full text not available from this repository.Abstract
Replacement of hole-transporting materials (HTM) for additive-free perovskite solar cells (PSCs) is an urgent issue. In this work, three new derivatives of dibenzothiophene with methoxyphenyl, trimethoxyphenyl, carbazole moieties are synthesized as hole-transporting materials for PSCs. The hole density dynamics and hole transporting properties of synthesized dibenzothiophene derivatives are investigated by combination of the charge extraction by linearly increasing voltage (CELIV) and time-of-flight (TOF) techniques. The TOF hole mobility (mu(h)) of one compound reaches the highest value of 4.2 x 10(-3) cm(2) V(-1)s(-1) at an electric field of 2.5 x 10(5) V cm(-1), however additive-free layers in PSCs did not show the best performance. Instead, the PSC efficiency is determined by a trade-off between the hole-mobility properties and the ``effective'' hole recombination rate k(B) ranging 0.5-40.3 ms(-1) as determined by means of the CELIV method. The best hole extraction properties are observed for a compound with mu(h) of 9.45 x 10(-4) cm(2) V(-1)s(-1) and k(B) of 11.8 ms(-1) which is coherent with its lowest energetic disorder sigma of 78.2 meV. Having both appropriate hole density dynamics and hole-transporting properties, hole-transporting layer of that compound allows to reach PCE of 20.9% for additive-free PSC, which is among the state-of-art values for devices with undoped HTM.
| Item Type: | Article |
|---|---|
| Funders: | Research Council of Lithuania (LMTLT) [Grant No: S-MIP-20-42], Swedish Foundation for Strategic Research [Grant No: RMA15-0130], University Malaya Impact Orientated Interdisciplinary Research Grant [Grant No: IIRG005A-19FNW], Swedish Foundation for Strategic Research [Grant No: RMA15-0130] |
| Uncontrolled Keywords: | Additive-free hole-transporting materials; Energetic disorder parameters; Hole mobility; Hole recombination dynamics; Perovskite solar cells |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 19 Oct 2023 08:20 |
| Last Modified: | 20 Oct 2023 01:13 |
| URI: | http://eprints.um.edu.my/id/eprint/41978 |
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