Photovoltaic & Optoelectronic Device Group: publications

Development of a beam imaging system for the European spallation source tuning dump

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 950 (2020) 162790

Authors:

MG Ibison, CP Welsch, E Adli, H Gjersdal, G Christoforo, T Shea, C Thomas, D Naeem

Elucidating the Role of a Tetrafluoroborate‐Based Ionic Liquid at the n‐Type Oxide/Perovskite Interface

Advanced Energy Materials Wiley 10:4 (2020)

Authors:

Nakita K Noel, Severin N Habisreutinger, Bernard Wenger, Yen‐Hung Lin, Fengyu Zhang, Jay B Patel, Antoine Kahn, Michael B Johnston, Henry J Snaith

Strong Performance Enhancement in Lead-Halide Perovskite Solar Cells through Rapid, Atmospheric Deposition of n-type Buffer Layer Oxides

(2019)

Authors:

Ravi D Raninga, Robert A Jagt, Solène Béchu, Tahmida N Huq, Mark Nikolka, Yen-Hung Lin, Mengyao Sun, Zewei Li, Wen Li, Muriel Bouttemy, Mathieu Frégnaux, Henry J Snaith, Philip Schulz, Judith L MacManus-Driscoll, Robert LZ Hoye

Revealing the stoichiometric tolerance of lead tri-halide perovskite thin-films

Chemistry of Materials American Chemical Society (ACS) (2019) acs.chemmater.9b02639

Authors:

Alexandra J Ramadan, Maryline Ralaiarisoa, Fengshuo Zu, Luke A Rochford, Bernard WENGER, Norbert Koch, Henry SNAITH

Improved Interface Charge Extraction by Double Electron Transport Layers for High‐Efficient Planar Perovskite Solar Cells

Solar RRL Wiley 3:12 (2019) 1900314

Authors:

Yanbo Gao, Yanjie Wu, Yue Liu, Cong Chen, Xinyu Shen, Xue Bai, Zhifeng Shi, William W Yu, Qilin Dai, Yu Zhang

Abstract:

Charge extraction by electron transport layers (ETLs) plays a vital role in improving the performance of perovskite solar cells (PSCs). Here, PSCs with four different types of ETLs, such as SnO2, amorphous‐Zn2SnO4 (am‐ZTO), am‐ZTO/SnO2, and SnO2/am‐ZTO, are successfully synthesized. The interface recombination behavior and the charge transport properties of the devices affected by four types of ETLs are systematically investigated. For dual am‐ZTO/SnO2 ETLs, compact am‐ZTO ETL prepared by the pulsed laser deposition method provides a dense physical contact with FTO than the spin coating films, decreasing leakage current and improving charge collection at the interface of ETL/FTO. Moreover, dual am‐ZTO/SnO2 ETLs lead to large free energy difference (ΔG), improving electron injection from perovskite to ETLs. One additional electron pathway from perovskite to am‐ZTO is formed, which can also improve electron injection efficiency. A power conversion efficiency of 20.04% and a stabilized efficiency of 19.17% are achieved for the device based on dual am‐ZTO/SnO2 ETLs. Most importantly, the devices are fabricated at a low temperature of 150 °C, which offers a potential method for large‐scale production of PSCs, and paves the way for the development of flexible PSCs. It is believed that this work provides a strategy to design ETLs via controlling ΔG and interface contact to improve the performance of PSCs.

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