Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells

Luis Victor Torres Merino; Christopher E. Petoukhoff; Oleksandr Matiash; Anand Selvin Subbiah; Carolina Villamil Franco; Pia Dally; Badri Vishal; Sofiia Kosar; Diego Rosas Villalva; Vladyslav Hnapovskyi; Esma Ugur; Sahil Shah; Francisco Peña Camargo; Orestis Karalis; Hannes Hempel; Igal Levine; Rakesh R. Pradhan; Suzana Kralj; Nikhil Kalasariya; Maxime Babics; Bumin Kagan Yildirim; Ahmed A. Said; Erkan Aydin; Helen Bristow; Subhashri Mannar; Waseem Raja; Anil Reddy Pininti; Adi Prasetio; Arsalan Razzaq; Hamza Al Nasser; Thomas G. Allen; Furkan H. Isikgor; Derya Baran; Thomas D. Anthopoulos; Monica Morales Masis; Udo Schwingenschlögl; Thomas Unold; Martin Stolterfoht; Frédéric Laquai; Stefaan De Wolf

doi:10.1016/j.joule.2024.06.017

Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells

Luis Victor Torres Merino^*, Christopher E. Petoukhoff, Oleksandr Matiash, Anand Selvin Subbiah, Carolina Villamil Franco, Pia Dally, Badri Vishal, Sofiia Kosar, Diego Rosas Villalva, Vladyslav Hnapovskyi, Esma Ugur, Sahil Shah, Francisco Peña Camargo, Orestis Karalis, Hannes Hempel, Igal Levine, Rakesh R. Pradhan, Suzana Kralj, Nikhil Kalasariya, Maxime BabicsBumin Kagan Yildirim, Ahmed A. Said, Erkan Aydin, Helen Bristow, Subhashri Mannar, Waseem Raja, Anil Reddy Pininti, Adi Prasetio, Arsalan Razzaq, Hamza Al Nasser, Thomas G. Allen, Furkan H. Isikgor, Derya Baran, Thomas D. Anthopoulos, Monica Morales Masis, Udo Schwingenschlögl, Thomas Unold, Martin Stolterfoht, Frédéric Laquai, Stefaan De Wolf^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

This work discusses the need to enhance charge carrier collection to minimize halide segregation in wide band-gap (WBG) perovskites. Here, we systematically elucidate the impact of valence band maximum (VBM) offsets and energetic barriers formed at the hole transport layer (HTL)/perovskite interface on charge accumulation, its influence on halide segregation, and ultimately on perovskite solar cell (PSC) long-term photostability. To this end, we precisely tune the VBM-HTL energetic levels by employing blends of self-assembled monolayers (SAMs; MeO-2PACz and Br-2PACz) to fabricate customized HTLs for PSCs with three different WBG perovskite photoabsorbers (1.69, 1.81, and 2.00 eV), commonly used in various tandem configurations. We find that optimized energetic alignment at the SAM HTL/perovskite interface significantly enhances the long-term photostability of the WBG PSCs. Our results show that photostability of devices can be predicted when comparing HTL/perovskite interfaces using photoluminescence's evolution and transient surface photovoltage spectroscopies of half-stacks (glass/metal oxide/HTL/perovskite) in correlation with halide segregation.

Original language	English (US)
Pages (from-to)	2585-2606
Number of pages	22
Journal	Joule
Volume	8
Issue number	9
DOIs	https://doi.org/10.1016/j.joule.2024.06.017
State	Published - Sep 18 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Inc.

Keywords

energy alignment
halide segregation
hole transport layer
mixed SAMs
perovskite
photoluminescence evolution
photostability
self-assembled monolayer
wide band gap

ASJC Scopus subject areas

General Energy

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10.1016/j.joule.2024.06.017

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Torres Merino, L. V., Petoukhoff, C. E., Matiash, O., Subbiah, A. S., Franco, C. V., Dally, P., Vishal, B., Kosar, S., Rosas Villalva, D., Hnapovskyi, V., Ugur, E., Shah, S., Peña Camargo, F., Karalis, O., Hempel, H., Levine, I., Pradhan, R. R., Kralj, S., Kalasariya, N., ... De Wolf, S. (2024). Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells. Joule, 8(9), 2585-2606. https://doi.org/10.1016/j.joule.2024.06.017

@article{80f72fce438a49799e1baa5fb62dc108,

title = "Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells",

abstract = "This work discusses the need to enhance charge carrier collection to minimize halide segregation in wide band-gap (WBG) perovskites. Here, we systematically elucidate the impact of valence band maximum (VBM) offsets and energetic barriers formed at the hole transport layer (HTL)/perovskite interface on charge accumulation, its influence on halide segregation, and ultimately on perovskite solar cell (PSC) long-term photostability. To this end, we precisely tune the VBM-HTL energetic levels by employing blends of self-assembled monolayers (SAMs; MeO-2PACz and Br-2PACz) to fabricate customized HTLs for PSCs with three different WBG perovskite photoabsorbers (1.69, 1.81, and 2.00 eV), commonly used in various tandem configurations. We find that optimized energetic alignment at the SAM HTL/perovskite interface significantly enhances the long-term photostability of the WBG PSCs. Our results show that photostability of devices can be predicted when comparing HTL/perovskite interfaces using photoluminescence's evolution and transient surface photovoltage spectroscopies of half-stacks (glass/metal oxide/HTL/perovskite) in correlation with halide segregation.",

keywords = "energy alignment, halide segregation, hole transport layer, mixed SAMs, perovskite, photoluminescence evolution, photostability, self-assembled monolayer, wide band gap",

author = "{Torres Merino}, {Luis Victor} and Petoukhoff, {Christopher E.} and Oleksandr Matiash and Subbiah, {Anand Selvin} and Franco, {Carolina Villamil} and Pia Dally and Badri Vishal and Sofiia Kosar and {Rosas Villalva}, Diego and Vladyslav Hnapovskyi and Esma Ugur and Sahil Shah and {Pe{\~n}a Camargo}, Francisco and Orestis Karalis and Hannes Hempel and Igal Levine and Pradhan, {Rakesh R.} and Suzana Kralj and Nikhil Kalasariya and Maxime Babics and Yildirim, {Bumin Kagan} and Said, {Ahmed A.} and Erkan Aydin and Helen Bristow and Subhashri Mannar and Waseem Raja and Pininti, {Anil Reddy} and Adi Prasetio and Arsalan Razzaq and {Al Nasser}, Hamza and Allen, {Thomas G.} and Isikgor, {Furkan H.} and Derya Baran and Anthopoulos, {Thomas D.} and Masis, {Monica Morales} and Udo Schwingenschl{\"o}gl and Thomas Unold and Martin Stolterfoht and Fr{\'e}d{\'e}ric Laquai and {De Wolf}, Stefaan",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Inc.",

year = "2024",

month = sep,

day = "18",

doi = "10.1016/j.joule.2024.06.017",

language = "English (US)",

volume = "8",

pages = "2585--2606",

journal = "Joule",

issn = "2542-4351",

publisher = "Cell Press",

number = "9",

}

Torres Merino, LV , Petoukhoff, CE , Matiash, O , Subbiah, AS, Franco, CV, Dally, P , Vishal, B , Kosar, S , Rosas Villalva, D , Hnapovskyi, V , Ugur, E, Shah, S, Peña Camargo, F, Karalis, O, Hempel, H, Levine, I, Pradhan, RR, Kralj, S, Kalasariya, N, Babics, M, Yildirim, BK, Said, AA, Aydin, E, Bristow, H, Mannar, S, Raja, W, Pininti, AR , Prasetio, A , Razzaq, A , Al Nasser, H , Allen, TG , Isikgor, FH , Baran, D, Anthopoulos, TD, Masis, MM, Schwingenschlögl, U, Unold, T, Stolterfoht, M, Laquai, F & De Wolf, S 2024, 'Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells', Joule, vol. 8, no. 9, pp. 2585-2606. https://doi.org/10.1016/j.joule.2024.06.017

TY - JOUR

T1 - Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells

AU - Torres Merino, Luis Victor

AU - Petoukhoff, Christopher E.

AU - Matiash, Oleksandr

AU - Subbiah, Anand Selvin

AU - Franco, Carolina Villamil

AU - Dally, Pia

AU - Vishal, Badri

AU - Kosar, Sofiia

AU - Rosas Villalva, Diego

AU - Hnapovskyi, Vladyslav

AU - Ugur, Esma

AU - Shah, Sahil

AU - Peña Camargo, Francisco

AU - Karalis, Orestis

AU - Hempel, Hannes

AU - Levine, Igal

AU - Pradhan, Rakesh R.

AU - Kralj, Suzana

AU - Kalasariya, Nikhil

AU - Babics, Maxime

AU - Yildirim, Bumin Kagan

AU - Said, Ahmed A.

AU - Aydin, Erkan

AU - Bristow, Helen

AU - Mannar, Subhashri

AU - Raja, Waseem

AU - Pininti, Anil Reddy

AU - Prasetio, Adi

AU - Razzaq, Arsalan

AU - Al Nasser, Hamza

AU - Allen, Thomas G.

AU - Isikgor, Furkan H.

AU - Baran, Derya

AU - Anthopoulos, Thomas D.

AU - Masis, Monica Morales

AU - Schwingenschlögl, Udo

AU - Unold, Thomas

AU - Stolterfoht, Martin

AU - Laquai, Frédéric

AU - De Wolf, Stefaan

PY - 2024/9/18

Y1 - 2024/9/18

N2 - This work discusses the need to enhance charge carrier collection to minimize halide segregation in wide band-gap (WBG) perovskites. Here, we systematically elucidate the impact of valence band maximum (VBM) offsets and energetic barriers formed at the hole transport layer (HTL)/perovskite interface on charge accumulation, its influence on halide segregation, and ultimately on perovskite solar cell (PSC) long-term photostability. To this end, we precisely tune the VBM-HTL energetic levels by employing blends of self-assembled monolayers (SAMs; MeO-2PACz and Br-2PACz) to fabricate customized HTLs for PSCs with three different WBG perovskite photoabsorbers (1.69, 1.81, and 2.00 eV), commonly used in various tandem configurations. We find that optimized energetic alignment at the SAM HTL/perovskite interface significantly enhances the long-term photostability of the WBG PSCs. Our results show that photostability of devices can be predicted when comparing HTL/perovskite interfaces using photoluminescence's evolution and transient surface photovoltage spectroscopies of half-stacks (glass/metal oxide/HTL/perovskite) in correlation with halide segregation.

AB - This work discusses the need to enhance charge carrier collection to minimize halide segregation in wide band-gap (WBG) perovskites. Here, we systematically elucidate the impact of valence band maximum (VBM) offsets and energetic barriers formed at the hole transport layer (HTL)/perovskite interface on charge accumulation, its influence on halide segregation, and ultimately on perovskite solar cell (PSC) long-term photostability. To this end, we precisely tune the VBM-HTL energetic levels by employing blends of self-assembled monolayers (SAMs; MeO-2PACz and Br-2PACz) to fabricate customized HTLs for PSCs with three different WBG perovskite photoabsorbers (1.69, 1.81, and 2.00 eV), commonly used in various tandem configurations. We find that optimized energetic alignment at the SAM HTL/perovskite interface significantly enhances the long-term photostability of the WBG PSCs. Our results show that photostability of devices can be predicted when comparing HTL/perovskite interfaces using photoluminescence's evolution and transient surface photovoltage spectroscopies of half-stacks (glass/metal oxide/HTL/perovskite) in correlation with halide segregation.

KW - energy alignment

KW - halide segregation

KW - hole transport layer

KW - mixed SAMs

KW - perovskite

KW - photoluminescence evolution

KW - photostability

KW - self-assembled monolayer

KW - wide band gap

UR - http://www.scopus.com/inward/record.url?scp=85200340004&partnerID=8YFLogxK

U2 - 10.1016/j.joule.2024.06.017

DO - 10.1016/j.joule.2024.06.017

M3 - Article

AN - SCOPUS:85200340004

SN - 2542-4351

VL - 8

SP - 2585

EP - 2606

JO - Joule

JF - Joule

IS - 9

ER -

Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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