We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Employing 2D‐Perovskite as an Electron Blocking Layer in Highly Efficient (18.5%) Perovskite Solar Cells with Printable Low Temperature Carbon Electrode.
- Authors
Zouhair, Salma; Yoo, So‐Min; Bogachuk, Dmitry; Herterich, Jan Philipp; Lim, Jaekeun; Kanda, Hiroyuki; Son, Byoungchul; Yun, Hyung Joong; Würfel, Uli; Chahboun, Adil; Nazeeruddin, Mohammad Khaja; Hinsch, Andreas; Wagner, Lukas; Kim, Hobeom
- Abstract
Interface engineering and passivating contacts are key enablers to reach the highest efficiencies in photovoltaic devices. While printed carbon–graphite back electrodes for hole‐transporting material (HTM)‐free perovskite solar cells (PSCs) are appealing for fast commercialization of PSCs due to low processing costs and extraordinary stability, this device architecture so far suffers from severe performance losses at the back electrode interface. Herein, a 2D perovskite passivation layer as an electron blocking layer (EBL) at this interface to substantially reduce interfacial recombination losses is introduced. The formation of the 2D perovskite EBL is confirmed through X‐ray diffraction, photoemission spectroscopy, and an advanced spectrally resolved photoluminescence microscopy mapping technique. Reduced losses that lead to an enhanced fill factor and VOC are quantified by electrochemical impedance spectroscopy and JSC–VOC measurements. This enables reaching one of the highest reported efficiencies of 18.5% for HTM‐free PSCs using 2D perovskite as an EBL with a significantly improved device stability.
- Subjects
SOLAR cells; LOW temperatures; PHOTOELECTRON spectroscopy; PEROVSKITE; ELECTRONS; IMPEDANCE spectroscopy; CARBON electrodes
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 21, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202200837