journal article·2024-12-13

Interfacial Decoupling Layer Enabled Low-n Phase Enrichment for Blue Quasi-2D Perovskites

Jie Dong, Wenqiang Yang, Kayoung Cho, Jeong Hyun Jung, Huanyu Zhou, Eojin Yoon, Hao Chen, Hyeon-Dong Lee, Seung Hyeon Jo, Jae-Man Park, Qingsen Zeng, Tingyu Long, Kyung Yeon Jang, Seong Eui Chang, Chan-Yul Park, Min-Jun Sung, Joo Sung Kim, Hyeree Kim, Dandan Song, Zheng Xu, JaeHong Park, Jeong-Yun Sun, Tae-Woo Lee

ACS Energy Letters· Volume 9· Issue 12
Publisher page

Abstract

The random n -monolayer phase distributions and impurity phases impose challenges to achieving blue-emission quasi-2D perovskite light emitting diodes (PeLEDs), and their formation mechanism is unclear. Here, we uncover the reasons behind the phase formation and distribution in blue-emission quasi-2D perovskites by probing into the molecular interactions at the buried interface between substrates and perovskites and propose a mechanistic model to depict the film formation process. Furthermore, an interfacial decoupling layer, perfluorinated ionomer, was employed to successfully mitigate the negative impact of substrates on the phase formation and distribution of blue-emission quasi-2D perovskites, resulting in an ordered phase distribution and a reduction of undesired phases. Besides, this interfacial layer effectively suppressed the nonradiative recombination losses, leading to enhanced photoluminescence quantum yield from 12.71% to 60.13% and notable blue shift (∼10 nm) even without incorporating Cl ions. As a result, blue PeLEDs based on this strategy achieved an external quantum efficiency reaching 12.09%.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · 2D Materials and Applications

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

Affiliations

Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro Gwanak-gu, Seoul 08826, Republic of Korea

Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, P. R. China

Department of Electronics & Information Engineering, Suzhou Vocational University, Suzhou, Jiangsu 215104, P. R. China

Institute of Atomic Manufacturing, International Institute for Interdisciplinary and Frontiers, Beihang University, Beijing 100191, P. R. China

Department of Chemistry and NanoScience, Ewha Womans University, Seoul 03760, Republic of Korea

College of Materials Science and Optoelectronic Technology, Center of Materials Science and Optoelectronics Engineering, College of Resources and Environment, CAS Center for Excellence in Topological Quantum Computation, CAS Key Laboratory of Vacuum Physic, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Institute of Engineering Research, Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Soft Foundry, Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea

SN Display Co., Ltd., 1 Gwanak-ro, Seoul 08826, Republic of Korea

Funding

National Research Foundation of Korea · Technology Innovation Program Development Program

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