DataVXACS Energy LettersPaper
journal article·2021-03-25

Localized Electron Density Engineering for Stabilized B-γ CsSnI3-Based Perovskite Solar Cells with Efficiencies >10%

Tao Ye, Xizu Wang, Kai Wang, Shaoyang Ma, Dong Yang, Yuchen Hou, Jungjin Yoon, Ke Wang, Shashank Priya

ACS Energy Letters
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Source abstract

Abstract

Black orthorhombic (B-γ) CsSnI3 with low toxicity and excellent optoelectronic properties is a promising candidate for perovskite solar cell (PSC). However, the performance of the B-γ CsSnI3-based PSCs is much lower than their lead-based or organotin-based counterparts due to the heavy self-doping of Sn2+ to form Sn4+ under ambient-air conditions. Here, this undesirable oxidation in CsSnI3 is restricted by engineering the localized electron density with phthalimide (PTM) additive. The lone electron pairs of NH and two CO units of PTM are designed to form trigeminal coordination bonding with Sn2+, resulting in reduced defect density and relatively grain-ordered perovskite film. The champion efficiencies of 10.1% and 9.6% are obtained for the modified rigid and flexible B-γ CsSnI3-based PSCs, respectively. These encapsulated devices maintain 94.3%, 83.4%, and 81.3% of their initial efficiencies under inert (60 days), ambient (45 days), and 1 Sun continuous illumination at ∼70 °C (2000 min) conditions, respectively.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Organic and Molecular Conductors Research · Conducting polymers and applications

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

Affiliations

Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States

Agency for Science, Technology and Research, Institute of Materials Research and Engineering (IMRE), #08-03, 2 Fusionopolis Way, Innovis 138634, Singapore

Key Laboratory of All Optical Network and Advanced Telecommunication Network of Ministry of Education, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, United States

Funding

Defense Advanced Research Projects Agency · Ministry of Education of the People's Republic of China · Office of Naval Research · National Science Foundation · Army RIF · Nanosonic Inc.

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