Evidence map›Paper›PMID 40535458›Full record

ArticleACS energy letters2025

Unveiling the Role of Guanidinium for Enhanced Charge Extraction in Inverted Perovskite Solar Cells.

Weidong Xu, Ganghong Min, Felix Utama Kosasih, Yueyao Dong, Ziyuan Ge, Qichun Gu, Muzi Chen, Richard A Pacalaj, Tong Wang, Thomas Webb and 15 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in ACS energy letters, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Separate and combined effects of GuaJournal of materials chemistry. A · 2026
    Article
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

25 authors.

Weidong XuDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Ganghong MinDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Felix Utama KosasihDepartment of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.
Yueyao DongDepartment of Electronic & Electrical Engineering, University College London, London WC1E 7JE, U.K.ORCID https://orcid.org/0000-0003-4571-3146
Ziyuan GeDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.ORCID https://orcid.org/0000-0001-7820-2073
Qichun GuDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Muzi ChenDepartment of Materials and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K.ORCID https://orcid.org/0009-0009-4262-1095
Richard A PacalajDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Tong WangDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Thomas WebbDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.
Tian DuDepartment of Materials and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K.ORCID https://orcid.org/0000-0002-0566-1145
Marcello RighettoDepartment of Physics and Astronomy, London Centre for Nanotechnology, University College London, London WC1E 6BT, U.K.ORCID https://orcid.org/0000-0001-5507-1445
Guanjie HeChristopher Ingold Laboratory, Department of Chemistry, University College London, London WC1H 0AJ, U.K.ORCID https://orcid.org/0000-0002-7365-9645
Mischa HilleniusDepartment of Physics and Astronomy, VU Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
Elizabeth von HauffDepartment of Physics and Astronomy, VU Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
Giorgio DivitiniDepartment of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.ORCID https://orcid.org/0000-0003-2775-610X
Caterina DucatiDepartment of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.ORCID https://orcid.org/0000-0003-3366-6442
Martyn A McLachlanDepartment of Materials and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K.ORCID https://orcid.org/0000-0003-3136-1661
Franco CacialliDepartment of Physics and Astronomy, London Centre for Nanotechnology, University College London, London WC1E 6BT, U.K.
Saif A HaqueDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.ORCID https://orcid.org/0000-0001-5483-3321
Artem A BakulinDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.ORCID https://orcid.org/0000-0002-3998-2000
James R DurrantDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.ORCID https://orcid.org/0000-0001-8353-7345
Chieh-Ting LinDepartment of Chemical Engineering, National Chung Hsing University, No.145, Xingda Road, South District, Taichung 40227, Taiwan.ORCID https://orcid.org/0000-0002-9591-0888
Samuel D StranksDepartment of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, U.K. CB3 0AS.ORCID https://orcid.org/0000-0002-8303-7292
Thomas J MacdonaldDepartment of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.ORCID https://orcid.org/0000-0002-7520-6893

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The incorporation of guanidinium (Gua) cations has significantly enhanced the optoelectronic properties of various perovskite compositions. When combined with other A-site cations in perovskite solar cells (PSCs), Gua cations not only enhance the power conversion efficiency of the solar cells but often improve their overall stability. While most studies examining the impact of Gua focus on PSCs with the n-i-p (conventional) structure, fewer have investigated its effects on the mechanism and performance of the p-i-n (inverted) structure. We investigate how partially substituting A-site cations with Gua affects the performance of PSCs and the associated charge carrier dynamics. Enhanced performance is observed in Gua-substituted inverted PSCs, primarily due to improved short-circuit current density and fill factor values. Our spectroscopic and microscopic analyses reveal that these enhancements stem from accelerated charge transport within the perovskite layer combined with inhibited ion migration following Gua incorporation, attributed to the reduction of localized inhomogeneities, which also notably enhance device stability. Our findings elucidate the role of Gua in inverted PSCs, showing negligible impact on open-circuit voltage but significant improvement in charge extraction efficiency. This contrasts with previous reports on conventional structures, where performance enhancement is primarily attributed to trap state reduction, resulting in higher open-circuit voltage.

Identifiers

PMID40535458
PMCPMC12172050

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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.