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Li J, Ni Y, Zhao X, Wang B, Xue C, Bi Z, Zhang C, Dong Y, Tong Y, Tang Q, Liu Y. Vertically stacked skin-like active-matrix display with ultrahigh aperture ratio. LIGHT, SCIENCE & APPLICATIONS 2024; 13:177. [PMID: 39060257 PMCID: PMC11282298 DOI: 10.1038/s41377-024-01524-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 06/06/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024]
Abstract
Vertically stacked all-organic active-matrix organic light-emitting diodes are promising candidates for high-quality skin-like displays due to their high aperture ratio, extreme mechanical flexibility, and low-temperature processing ability. However, these displays suffer from process interferences when interconnecting functional layers made of all-organic materials. To overcome this challenge, we present an innovative integration strategy called "discrete preparation-multilayer lamination" based on microelectronic processes. In this strategy, each functional layer was prepared separately on different substrates to avoid chemical and physical damage caused by process interferences. A single interconnect layer was introduced between each vertically stacked functional layer to ensure mechanical compatibility and interconnection. Compared to the previously reported layer-by-layer preparation method, the proposed method eliminates the need for tedious protection via barrier and pixel-defining layer processing steps. Additionally, based on active-matrix display, this strategy allows multiple pixels to collectively display a pattern of "1" with an aperture ratio of 83%. Moreover, the average mobility of full-photolithographic organic thin-film transistors was 1.04 cm2 V-1 s-1, ensuring stable and uniform displays. This strategy forms the basis for the construction of vertically stacked active-matrix displays, which should facilitate the commercial development of skin-like displays in wearable electronics.
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Affiliation(s)
- Juntong Li
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Yanping Ni
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Xiaoli Zhao
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China.
| | - Bin Wang
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Chuang Xue
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Zetong Bi
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Cong Zhang
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Yongjun Dong
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China.
| | - Yanhong Tong
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
| | - Qingxin Tang
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China.
| | - Yichun Liu
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, China
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Kuang C, Li S, Murtaza I, Meng Z, Li H, Zhang X, Wu C, Tong KN, Shang Y, He Y, Zhu Y, Wei G, Meng H. Enhanced Horizontal Dipole Orientation by Novel Penta-Helicene Anthracene-Based Host for Efficient Blue Fluorescent OLEDs. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311114. [PMID: 38157494 DOI: 10.1002/smll.202311114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Due to the relatively low photoluminescence quantum yield (PLQY) and horizontal dipole orientation of doped films, anthracene-based fluorescent organic light-emitting diodes (F-OLEDs) have faced a great challenge to achieve high external quantum efficiency (EQE). Herein, a novel approach is introduced by incorporating penta-helicene into anthracene, presented as linear-shaped 3-(4-(10-phenylanthracen-9-yl)phenyl)dibenzo[c,g]phenanthrene (BABH) and 3-(4-(10-(naphthalen-2-yl)anthracen-9-yl)phenyl)dibenzo[c,g]phenanthrene (NABH). These blue hosts exhibit minimal intermolecular overlap of π-π stacking, effectively suppressing excimer formation, which facilitates the effective transfer of singlet energy to the fluorescent dopant for PLQY as high as 90%. Additionally, the as-obtained two hosts of BABH and NABH have effectively demonstrated major horizontal components transition dipole moments (TDM) and high thermal stability with glass transitional temperature (Tg) surpassing 188 °C, enhancing the horizontal dipole orientation of their doped films to be 89% and 93%, respectively. The OLEDs based on BABH and NABH exhibit excellent EQE of 10.5% and 12.4% at 462 nm and device lifetime up to 90% of the initial luminance over 4500 h at 100 cd m-2, which has firmly established them as among the most efficient blue F-OLEDs based on anthracene to date to the best knowledge. This work provides an instructive strategy to design an effective host for highly efficient and stable F-OLEDs.
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Affiliation(s)
- Changchun Kuang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Siqi Li
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Imran Murtaza
- Department of Physics, International Islamic University, Islamabad, 44000, Pakistan
| | - Zhimin Meng
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Hongyang Li
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Xinkang Zhang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Chengcheng Wu
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Kai-Ning Tong
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Yifan Shang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Yaowu He
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Yanan Zhu
- Faculty of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 518172, China
| | - Guodan Wei
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Hong Meng
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
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