Evidence map›Paper›PMID 39629953›Full record

ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2025

Effects of Alkyl Spacer Length in Carbazole-Based Self-Assembled Monolayer Materials on Molecular Conformation and Organic Solar Cell Performance.

Qiaonan Chen, Kangbo Sun, Leandro R Franco, Jingnan Wu, Lars Öhrström, Xianjie Liu, Maureen Gumbo, Mailde S Ozório, C Moyses Araujo, Guangye Zhang and 6 more

Abstract read
In one paragraph

Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

  1. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors.

Qiaonan ChenDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.ORCID https://orcid.org/0000-0002-1788-9454
Kangbo SunCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen, 518118, China.ORCID https://orcid.org/0000-0002-6223-6751
Leandro R FrancoDepartment of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
Jingnan WuDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.ORCID https://orcid.org/0000-0002-9868-3721
Lars ÖhrströmDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.ORCID https://orcid.org/0000-0002-6420-2141
Xianjie LiuDepartment of Science and Technology, Laboratory of Organic Electronics (LOE), Linköping University, Norrköping, 60174, Sweden.ORCID https://orcid.org/0000-0002-3190-2774
Maureen GumboDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.ORCID https://orcid.org/0000-0001-7018-4595
Mailde S OzórioDepartment of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen, DK-2100, Denmark.
C Moyses AraujoDepartment of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
Guangye ZhangCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen, 518118, China.
André JohanssonDepartment of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
Ellen MoonsDepartment of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
Mats FahlmanDepartment of Science and Technology, Laboratory of Organic Electronics (LOE), Linköping University, Norrköping, 60174, Sweden.ORCID https://orcid.org/0000-0001-9879-3915
Donghong YuDepartmetnt of Chemistry and Bioscience, Aalborg University, Aalborg, DK-9220, Denmark.ORCID https://orcid.org/0000-0002-3035-5035
Yufei WangCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen, 518118, China.
Ergang WangDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.ORCID https://orcid.org/0000-0002-4942-3771

Funding

Basic and Applied Basic Research Foundation of Guangdong Province 2022A1515010875Carl Trygger Foundation CTS 15.332National Natural Science Foundation of China 12404480Shenzhen Key Laboratory of Applied Technologies of Super-Diamond and Functional Crystals ZDSYS20230626091303007Sino-Danish CenterSwedish Energy Agency P2021-90067Swedish Foundation for Strategic Research SIP21-0044Swedish Research Council 2019-04683Swedish Research Council 2020-05223Swedish Research Council 2021-04798Swedish Research Council 2022-06725Swedish Research Council Formas 2020-01201Swedish Research Council Formas 2023-01008Wallenberg Foundation 2022.0192
6 · The paper itself

Abstract

Carbazole-based self-assembled monolayer (SAM) materials as hole transport layers (HTL) have led organic solar cells (OSCs) to state-of-the-art photovoltaic performance. Nonetheless, the impact of the alkyl spacer length of SAMs remains inadequately understood. To improve the knowledge, four dichloride-substituted carbazole-based SAMs (from 2Cl-2PACz to 2Cl-5PACz) with spacer lengths of 2-5 carbon atoms is developed. Single crystal analyses reveal that SAMs with shorter spacers exhibit stronger intermolecular interactions and denser packing. The molecular conformation of SAMs significantly impacts their molecular footprint and coverage on ITO. These factors result in the highest coverage of 2Cl-2PACz and the lowest coverage for 2Cl-3PACz on ITO. OSCs based on PM6:L8-BO with 2Cl-2PACz as HTL achieved high efficiencies of 18.95% and 18.62% with and without methanol rinsing of the ITO/SAMs anodes, corresponding to monolayer and multilayer structures, respectively. In contrast, OSCs utilizing the other SAMs showed decreased efficiencies as spacer length increased. The superior performance of 2Cl-2PACz can be attributed to its shorter spacer, which reduces series resistance, hole tunneling distance, and barrier. This work provides valuable insights into the design of SAMs for high-performance OSCs.

Indexed as

alkyl spacer lengthintermolecular interactionmolecular conformationself‐assembled monolayer (SAM)single crystals

Identifiers

PMID39629953
PMCPMC11775572

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.