journal article·2021-05-11Open access

Isomeric Carbazole-Based Hole-Transporting Materials: Role of the Linkage Position on the Photovoltaic Performance of Perovskite Solar Cells

Albertus Adrian Sutanto, Vellaichamy Joseph, Cansu Igci, Olga A. Syzgantseva, Maria A. Syzgantseva, Vygintas Jankauskas, Kasparas Rakstys, Valentin I. E. Queloz, Ping-Yu Huang, Jen-Shyang Ni, Sachin Kinge, Abdullah M. Asiri, Ming-Chou Chen, Mohammad Khaja Nazeeruddin

Chemistry of Materials· Volume 33· Issue 9

Abstract

Two structural isomers of carbazole decorated with triarylamine have been designed and synthesized with a facile synthetic procedure. The impact of triarylamine substitution on the isomeric structural linkage of carbazole on the optical, thermal, electrochemical, and photovoltaic properties has been extensively studied by combining experimental and simulation methods. Car[2,3] showed a red shift in the absorption maximum compared to that of Car[1,3], indicating the linear conjugation along the 2,7-position of carbazole in the former. The high thermal decomposition temperature (>420 °C) of these compounds could be attributed to the rigid structure of the carbazole core. Perovskite solar cells fabricated with Car[2,3] as the hole transporting material (HTM) displayed the highest power conversion efficiency (PCE) of 19.23%. It can be attributed to the suitable energy alignment of the highest occupied molecular orbital (HOMO) of HTM with the adjacent perovskite valence band energy level, which results in efficient hole transport. Furthermore, the molecular dynamic simulation demonstrates that the triphenylamine substitution on the 2,3,6,7 positions of Car[2,3] results in a more planar molecular alignment on top of the perovskite surface, promoting an efficient hole extraction. Essentially, when Car[1,3] and Car[2,3] were applied in perovskite solar cells, they showed enhanced long-term stability by retaining >80% of their initial PCEs after 1000 h of continuous illumination.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1951 Sion, Switzerland

Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan, Taiwan 32001

Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia

Institute of Chemical Physics, Vilnius University, Sauletekio al. 3, Vilnius 10257, Lithuania

Department of Organic Chemistry, Kaunas University of Technology, Radvilenu pl. 19, Kaunas 50254, Lithuania

Department of Chemical and Materials Engineering, Photo-sensitive Material Advanced Research and Technology Center (Photo-SMART), National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan

Toyota Motor Technical Centre, Advanced Technology Division, Toyota Motor Corporation, Hoge Wei 33, B-1930 Zaventem, Belgium

Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung · Ministry of Science and Technology, Taiwan · NCU-DSM Research Center

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