Open Circuit Voltage Enhancement and Defect Suppression of Wide-Bandgap CsPbIBr2Perovskite Solar Cells by Phenylhydrazinium Chloride Incorporation

Waqas Siddique Subhani; Khalil Harrabi; Abdelkrim Mekki; Abdulaziz Aljalal; Menouer Saidani; Nabeel Aslam; Feichi Zhou

doi:10.1021/acsomega.5c11624

Open Circuit Voltage Enhancement and Defect Suppression of Wide-Bandgap CsPbIBr₂Perovskite Solar Cells by Phenylhydrazinium Chloride Incorporation

Waqas Siddique Subhani
, Khalil Harrabi^*
, Abdelkrim Mekki
, Abdulaziz Aljalal
, Menouer Saidani
, Nabeel Aslam
, Feichi Zhou

^*Corresponding author for this work

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

Abstract

Wide-bandgap (WBG) perovskite solar cells possess huge potential for integration into next-generation heterojunction photovoltaic systems. Conversely, their well-known commercialization is presently hindered by several challenges, including considerable open circuit voltage losses and poor long-term stability. Here, we report phenylhydrazinium chloride (PCl) as an effective dopant in WBG CsPbIBr₂ perovskite solar cells, which inhibits halide oxidation and demixing in addition to decreasing defect density, leading to highly crystalline perovskite films. As a result of lower defects, PSCs obtained by PCl WBG CsPbIBr₂ achieved a PCE of 10.83%, possessing a V_oc of 1.24 and an enhanced stability of more than 300 h. This work may deliver a viable solution toward the fabrication of WBG CsPbIBr₂ PSCs sub-cells for tandem solar cells.

Original language	English
Pages (from-to)	10545-10553
Number of pages	9
Journal	ACS Omega
Volume	11
Issue number	6
DOIs	https://doi.org/10.1021/acsomega.5c11624
State	Published - 17 Feb 2026

Bibliographical note

Publisher Copyright:
© 2026 The Authors. Published by American Chemical Society

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

Access to Document

10.1021/acsomega.5c11624

Cite this

@article{2bd3ca8dc6424ea8be55915f958f8201,

title = "Open Circuit Voltage Enhancement and Defect Suppression of Wide-Bandgap CsPbIBr2Perovskite Solar Cells by Phenylhydrazinium Chloride Incorporation",

abstract = "Wide-bandgap (WBG) perovskite solar cells possess huge potential for integration into next-generation heterojunction photovoltaic systems. Conversely, their well-known commercialization is presently hindered by several challenges, including considerable open circuit voltage losses and poor long-term stability. Here, we report phenylhydrazinium chloride (PCl) as an effective dopant in WBG CsPbIBr2 perovskite solar cells, which inhibits halide oxidation and demixing in addition to decreasing defect density, leading to highly crystalline perovskite films. As a result of lower defects, PSCs obtained by PCl WBG CsPbIBr2 achieved a PCE of 10.83\%, possessing a Voc of 1.24 and an enhanced stability of more than 300 h. This work may deliver a viable solution toward the fabrication of WBG CsPbIBr2 PSCs sub-cells for tandem solar cells.",

author = "Subhani, \{Waqas Siddique\} and Khalil Harrabi and Abdelkrim Mekki and Abdulaziz Aljalal and Menouer Saidani and Nabeel Aslam and Feichi Zhou",

note = "Publisher Copyright: {\textcopyright} 2026 The Authors. Published by American Chemical Society",

year = "2026",

month = feb,

day = "17",

doi = "10.1021/acsomega.5c11624",

language = "English",

volume = "11",

pages = "10545--10553",

journal = "ACS Omega",

issn = "2470-1343",

publisher = "American Chemical Society",

number = "6",

}

TY - JOUR

T1 - Open Circuit Voltage Enhancement and Defect Suppression of Wide-Bandgap CsPbIBr2Perovskite Solar Cells by Phenylhydrazinium Chloride Incorporation

AU - Subhani, Waqas Siddique

AU - Harrabi, Khalil

AU - Mekki, Abdelkrim

AU - Aljalal, Abdulaziz

AU - Saidani, Menouer

AU - Aslam, Nabeel

AU - Zhou, Feichi

PY - 2026/2/17

Y1 - 2026/2/17

N2 - Wide-bandgap (WBG) perovskite solar cells possess huge potential for integration into next-generation heterojunction photovoltaic systems. Conversely, their well-known commercialization is presently hindered by several challenges, including considerable open circuit voltage losses and poor long-term stability. Here, we report phenylhydrazinium chloride (PCl) as an effective dopant in WBG CsPbIBr2 perovskite solar cells, which inhibits halide oxidation and demixing in addition to decreasing defect density, leading to highly crystalline perovskite films. As a result of lower defects, PSCs obtained by PCl WBG CsPbIBr2 achieved a PCE of 10.83%, possessing a Voc of 1.24 and an enhanced stability of more than 300 h. This work may deliver a viable solution toward the fabrication of WBG CsPbIBr2 PSCs sub-cells for tandem solar cells.

AB - Wide-bandgap (WBG) perovskite solar cells possess huge potential for integration into next-generation heterojunction photovoltaic systems. Conversely, their well-known commercialization is presently hindered by several challenges, including considerable open circuit voltage losses and poor long-term stability. Here, we report phenylhydrazinium chloride (PCl) as an effective dopant in WBG CsPbIBr2 perovskite solar cells, which inhibits halide oxidation and demixing in addition to decreasing defect density, leading to highly crystalline perovskite films. As a result of lower defects, PSCs obtained by PCl WBG CsPbIBr2 achieved a PCE of 10.83%, possessing a Voc of 1.24 and an enhanced stability of more than 300 h. This work may deliver a viable solution toward the fabrication of WBG CsPbIBr2 PSCs sub-cells for tandem solar cells.

UR - https://www.scopus.com/pages/publications/105030550786

U2 - 10.1021/acsomega.5c11624

DO - 10.1021/acsomega.5c11624

M3 - Article

AN - SCOPUS:105030550786

SN - 2470-1343

VL - 11

SP - 10545

EP - 10553

JO - ACS Omega

JF - ACS Omega

IS - 6

ER -