journal article·2021-09-10Open access

Robust Unencapsulated Perovskite Solar Cells Protected by a Fluorinated Fullerene Electron Transporting Layer

Hsin-Hsiang Huang, Hsinhan Tsai, Rathinam Raja, Shu-Ling Lin, Dibyajyoti Ghosh, Cheng-Hung Hou, Jing-Jong Shyue, Sergei Tretiak, Wei Chen, King-Fu Lin, Wanyi Nie, Leeyih Wang

ACS Energy Letters· Volume 6· Issue 9

Abstract

The emergent perovskite photovoltaics technology faces challenges like the long-term durability combining moisture, thermal, and photo stresses that prevents them from competing with established technologies. Here, we introduce a series of new fluorinated fullerenes as an electron-transporting layer (ETL) for robust perovskite photovoltaics that deliver a high power conversion efficiency of 21.27% with substantially improved durability against environmental stressing. The hydrophobic nature of the new fullerene protects the unencapsulated perovskite cell with stability over 1400 h in 85% relative humidity. Notably, the unencapsulated device maintained 80% of their original performance (T80) after being immersed in water for over 10 min. Detailed characterizations suggest that the fluorinated fullerene can immobilize the cations in perovskites and passivate the surface traps. Therefore, the T80 lifetime of the devices under constant illumination reached 1920 h. On the basis of the accelerated test, we estimate a lifetime approaching 10 years with encapsulation. The successful demonstration of the new ETL can stimulate further research and momentum for future photovoltaic technology development.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications

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

Affiliations

Centre for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan

Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States

Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 10608, Taiwan

Physics and Chemistry of Materials, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

Research Center for Applied Science, Academia Sinica, Taipei 11529, Taiwan

Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States

Center of Atomic Initiative for New Materials, National Taiwan University, Taipei 10617, Taiwan

Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan

Funding

Los Alamos National Laboratory · Ministry of Education · Academia Sinica · Ministry of Science and Technology, Taiwan

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