Photovoltaic & Optoelectronic Device Group: publications

Performance and stability analysis of all-perovskite tandem photovoltaics in light-driven electrochemical water splitting

University of Oxford (2025)

Authors:

Junke Wang, Bruno Branco, Willemijn HM Remmerswaal, Shuaifeng Hu, Nick RM Schipper, Valerio Zardetto, Laura Bellini, Nicolas Daub, Martijn M Wienk, Atsushi Wakamiya, Henry J Snaith, René AJ Janssen

Abstract:

January 4, 2025

Approaching the radiative limits for wide bandgap perovskite solar cells using fullerene blend electron transport interlayers

University of Oxford (2025)

Authors:

Josephine Surel, Pietro Caprioglio, Joel Smith, Akash Dasgupta, Francesco Furlan, Charlie Henderson, Fengning Yang, Benjamin Gallant, Seongrok Seo, Alexander Knight, Manuel Kober-Czerny, Joel Luke, David McMeekin, Alexander Tartakovskii, Ji-Seon Kim, Nicola Gasparini, Henry Snaith

Abstract:

Data was acquired according to the methods section of this publication. Data files require Origin to process.

Data in support of Impact of precursor dosing on the surface passivation of AZO/AlOx stacks formed using atomic layer deposition

University of Oxford (2025)

Authors:

Yan Wang, Theodore Hobson, Jack Swallow, Shona McNab, John O'Sullivan, Anastasia Soeriyadi, Xinya Niu, Rebekah Fraser, Akash Dasgupta, Soumyajit Maitra, Pietro Altermatt, Robert Weatherup, Matthew Wright, Ruy Bonilla

Abstract:

All data reported in publication: Impact of precursor dosing on the surface passivation of AZO/AlOx stacks formed using atomic layer deposition

Dopant-induced interactions in spiro-OMeTAD: Advancing hole transport for perovskite solar cells

Materials Science and Engineering R Reports Elsevier 162 (2025) 100875

Authors:

Yueyao Dong, Florine M Rombach, Ganghong Min, Henry J Snaith, Chieh-Ting Lin, Saif A Haque, Thomas J Macdonald

Steering perovskite precursor solutions for multijunction photovoltaics

Nature Nature Research (2024)

Authors:

Shuaifeng Hu, Junke Wang, Pei Zhao, Jorge Pascual, Jianan Wang, Florine Rombach, Akash Dasgupta, Wentao Liu, Minh Anh Truong, He Zhu, Manuel Kober-Czerny, James N Drysdale, Joel A Smith, Zhongcheng Yuan, Guus JW Aalbers, Nick RM Schipper, Jin Yao, Kyohei Nakano, Silver-Hamill Turren-Cruz, André Dallmann, M Greyson Christoforo, James M Ball, David P McMeekin, Karl-Augustin Zaininger, Zonghao Liu, Nakita K Noel, Keisuke Tajima, Wei Chen, Masahiro Ehara, René AJ Janssen, Atsushi Wakamiya, Henry J Snaith

Abstract:

Multijunction photovoltaics (PVs) are gaining prominence owing to their superior capability of achieving power conversion efficiencies (PCEs) beyond the radiative limit of single-junction cells1-8, where improving narrow bandgap tin-lead perovskites is critical for thin-film devices9. With a focus on understanding the chemistry of tin-lead perovskite precursor solutions, we herein find that Sn(II) species dominate interactions with precursors and additives and uncover the exclusive role of carboxylic acid in regulating solution colloidal properties and film crystallisation, and ammonium in improving film optoelectronic properties. Materials that combine these two function groups, amino acid salts, considerably improve the semiconducting quality and homogeneity of perovskite films, surpassing the effect of the individual functional groups when introduced as part of separate molecules. Our enhanced tin-lead perovskite layer allows us to fabricate solar cells with PCEs of 23.9, 29.7 (certified 29.26%), and 28.7% for single-, double-, and triple-junction devices, respectively. Our 1-cm2 triple-junction devices show PCEs of 28.4% (certified 27.28%). Encapsulated triple-junction cells maintain 80% of their initial efficiencies after 860 h maximum power point tracking in ambient. We further fabricate quadruple-junction devices and obtain PCEs of 27.9% with the highest open-circuit voltage of 4.94 V. This work establishes a new benchmark for multijunction PVs.

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