1
|
Ji S, Bae SR, Hu L, Hoang AT, Seol MJ, Hong J, Katiyar AK, Kim BJ, Xu D, Kim SY, Ahn JH. Perovskite Light-Emitting Diode Display Based on MoS 2 Backplane Thin-Film Transistors. Adv Mater 2024; 36:e2309531. [PMID: 37985162 DOI: 10.1002/adma.202309531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/07/2023] [Indexed: 11/22/2023]
Abstract
The uniform deposition of perovskite light-emitting diodes (PeLEDs) and their integration with backplane thin-film transistors (TFTs) remain challenging for large-area display applications. Herein, an active-matrix PeLED display fabricated via the heterogeneous integration of cesium lead bromide LEDs and molybdenum disulfide (MoS2 )-based TFTs is presented. The single-source evaporation method enables the deposition of highly uniform perovskite thin films over large areas. PeLEDs are integrated with MoS2 TFTs to fabricate an active-matrix PeLED display with an 8 × 8 array, which exhibits excellent brightness control capability and high switching speed. This study demonstrates the potential of PeLEDs as candidates for next-generation displays and presents a novel approach for fabricating optoelectronic devices via the heterogeneous integration of 2D materials and perovskites, thereby paving the way toward the fabrication of practical future optoelectronic systems.
Collapse
Affiliation(s)
- Seunghyeon Ji
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sa-Rang Bae
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Luhing Hu
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Anh Tuan Hoang
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Myeong Jin Seol
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Juyeong Hong
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Ajit Kumar Katiyar
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Beom Jin Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Duo Xu
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Soo Young Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jong-Hyun Ahn
- School of Electrical and Electronic Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| |
Collapse
|
2
|
Bae SR, Seol MJ, Kim SY. CsPbBr 3 and Cs 4PbBr 6 perovskite light-emitting diodes using a thermally evaporated host-dopant system. Nanoscale 2023. [PMID: 37183829 DOI: 10.1039/d3nr01190a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This article shows the results of fabricating a device through vacuum deposition by synthesizing a perovskite thin film in the powder form. Light emitting diodes (LEDs) were fabricated using a single-source and host-dopant system of the perovskite produced in the powder form. Both CsPbBr3 and Cs4PbBr6 used in the host-dopant system were green, and the host was tris(8-quinolinolato) aluminum(III). It is confirmed that the display efficiency and optical characteristics are significantly improved by the dopant ratio. The 3%-doped CsPbBr3 based LED shows a luminance of 9083 cd m-2, 3.36% external quantum efficiency (EQE), and 96% photoluminescence quantum yield (PLQY) efficiency (for the undoped CsPbBr3 LED, luminance: 844 cd m-2/EQE: 1.93%/PLQY: 85%). The LED based on 5%-doped Cs4PbBr6 shows a luminance of 11 440 cd m-2, an EQE of 6.27%, and 99% PLQY efficiency (for the undoped Cs4PbBr6 LED, luminance:1113 cd m-2/EQE: 1.64%/PLQY: 93%). It is expected that the results of this research will contribute to the perovskite LED research performed by thermal evaporation in the future.
Collapse
Affiliation(s)
- Sa-Rang Bae
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Myeong Jin Seol
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Soo Young Kim
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| |
Collapse
|
3
|
Yoo YT, Heo DY, Bae SR, Park J, Lee TW, Jang HW, Ahn SH, Kim SY. Tailoring the Structure of Low-Dimensional Halide Perovskite through a Room Temperature Solution Process: Role of Ligands. Small Methods 2021; 5:e2100054. [PMID: 34927919 DOI: 10.1002/smtd.202100054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/27/2021] [Indexed: 06/14/2023]
Abstract
In this study, halide perovskite nanocrystals are synthesized by controlling the ligand length and amount, and investigated the effects on the change in the ligand length and amount on the shape, size, crystal structure, and optical properties of the perovskite nanocrystals. The results reveal the tendency and respective effects of amine and acid ligands on perovskite nanocrystals. The amine ligands bind directly to the perovskite nanocrystals. Consequently, the amine ligands with longer chains interfere with the aggregation of the initially formed nanocrystals, thus limiting the size of the halide perovskite nanocrystals. Similar to the amine ligands, the acid ligands directly bond with the perovskite nanocrystals; however, they are also indirectly distributed around the nanocrystals, thus affecting their structure and dispersion. Consequently, the acid ligands affect the assembly of the initially formed nanocrystals, which determine the shape and crystal structure of the nanocrystals. It is believed that the report will provide useful insight on the synthesis of halide perovskites for application in optoelectronic devices.
Collapse
Affiliation(s)
- Young-Taek Yoo
- School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Do Yeon Heo
- Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Sa-Rang Bae
- Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Jinwoo Park
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Tae-Woo Lee
- Department of Materials Science and Engineering, Institute of Engineering Research, Research Institute of Advanced Materials, Nano Systems Institute (NSI), Seoul National University, Seoul, 08826, Republic of Korea
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang Hyun Ahn
- School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Soo Young Kim
- Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, Seoul, 02841, Republic of Korea
| |
Collapse
|
4
|
Choi M, Bae SR, Hu L, Hoang AT, Kim SY, Ahn JH. Full-color active-matrix organic light-emitting diode display on human skin based on a large-area MoS 2 backplane. Sci Adv 2020; 6:eabb5898. [PMID: 32923597 PMCID: PMC7455500 DOI: 10.1126/sciadv.abb5898] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/27/2020] [Indexed: 05/06/2023]
Abstract
Electronic applications are continuously developing and taking new forms. Foldable, rollable, and wearable displays are applicable for human health care monitoring or robotics, and their operation relies on organic light-emitting diodes (OLEDs). Yet, the development of semiconducting materials with high mechanical flexibility has remained a challenge and restricted their use in unusual format electronics. This study presents a wearable full-color OLED display using a two-dimensional (2D) material-based backplane transistor. The 18-by-18 thin-film transistor array was fabricated on a thin MoS2 film that was transferred to Al2O3 (30 nm)/polyethylene terephthalate (6 μm). Red, green, and blue OLED pixels were deposited on the device surface. This 2D material offered excellent mechanical and electrical properties and proved to be capable of driving circuits for the control of OLED pixels. The ultrathin device substrate allowed for integration of the display on an unusual substrate, namely, a human hand.
Collapse
Affiliation(s)
- Minwoo Choi
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Sa-Rang Bae
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Luhing Hu
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Anh Tuan Hoang
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Soo Young Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jong-Hyun Ahn
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| |
Collapse
|
5
|
Kim YH, Park Y, Bae S, Kim SY, Han JG. Compressive Strength Evaluation of Ordinary Portland Cement Mortar Blended with Hydrogen Nano-Bubble Water and Graphene. J Nanosci Nanotechnol 2020; 20:647-652. [PMID: 31383227 DOI: 10.1166/jnn.2020.17287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Abnormal climate changes have occurred all over the world due to greenhouse gases (GHGs). Various countries are targeting emission reductions of GHGs in 2020 and trying to GHGs those in multiple fields. Cement-based structures account for a large part in the construction industry. One ton of carbon dioxide is produced during the manufacturing process for a ton of cement. Therefore, decreasing cement usage is essential for carbon dioxide reduction. However, strength characteristics of cement are necessary conditions to meet the required strength of a structure. Therefore, it is necessary to develop cement substitutes and economic additives. In this study, we proposed an eco-friendly blend ratio by comparing the compressive strength of Ordinary Portland Cement (OPC) mortar and two variations. One was a mortar with a small amount of APTMS-sGO added. The other was a mortar mixed with HNBW (hydrogen nano-bubble water) as an enhanced material instead of ordinary water. The mortar added with 0.1% of APTMS-sGO showed improved early strength compared with OPC mortar. Its strength was enhanced 31.1% by using HNBW as functional water. Strength was improved 20.4% for cement mortar added with Graphene Oxide after reacting with SAM containing APTMS. When the texture of both mortars became denser, early compressive strength at 7 days each was 20.4-31.1% higher than that of OPC mortar. Finally, the strength was increased by 10.2% at 28 days.
Collapse
Affiliation(s)
- Young-Ho Kim
- School of Civil & Environmental Engineering, Urban Design and Study, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea
| | - Yoonsuk Park
- School of Civil & Environmental Engineering, Urban Design and Study, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea
| | - SaRang Bae
- School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea
| | - Soo Young Kim
- School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea
| | - Jung-Geun Han
- School of Civil & Environmental Engineering, Urban Design and Study, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Republic of Korea
| |
Collapse
|
6
|
Choi M, Park YJ, Sharma BK, Bae SR, Kim SY, Ahn JH. Flexible active-matrix organic light-emitting diode display enabled by MoS 2 thin-film transistor. Sci Adv 2018; 4:eaas8721. [PMID: 29713686 PMCID: PMC5917918 DOI: 10.1126/sciadv.aas8721] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 03/02/2018] [Indexed: 05/17/2023]
Abstract
Atomically thin molybdenum disulfide (MoS2) has been extensively investigated in semiconductor electronics but has not been applied in a backplane circuitry of organic light-emitting diode (OLED) display. Its applicability as an active drive element is hampered by the large contact resistance at the metal/MoS2 interface, which hinders the transport of carriers at the dielectric surface, which in turn considerably deteriorates the mobility. Modified switching device architecture is proposed for efficiently exploiting the high-k dielectric Al2O3 layer, which, when integrated in an active matrix, can drive the ultrathin OLED display even in dynamic folding states. The proposed architecture exhibits 28 times increase in mobility compared to a normal back-gated thin-film transistor, and its potential as a wearable display attached to a human wrist is demonstrated.
Collapse
Affiliation(s)
- Minwoo Choi
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Yong Ju Park
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Bhupendra K. Sharma
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Sa-Rang Bae
- School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Soo Young Kim
- School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Jong-Hyun Ahn
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| |
Collapse
|
7
|
|
8
|
Abstract
In this study, we investigated whether retinal soluble proteins, such as S-antigen, play a role in the induction of nitric oxide by macrophages in vitro. Cells from the murine macrophage cell line RAW 264.7 and rat and rabbit peritoneal macrophages were incubated in the presence of retinal soluble protein. The nitrite level in the cultured supernatant was measured to determine nitric oxide production using the Griess reaction. S-antigen induced significant, dose-dependent nitrite production in both RAW 264.7 and rat peritoneal macrophages. The induction of inducible nitric oxide synthase by retinal protein was inhibited by the iNOS-specific inhibitor, aminoguanidine and the tyrosine inhibitor, genistein. These results show that soluble retinal protein significantly induces nitric acid production by macrophages. Increased production of reactive oxygen species by macrophages in the presence of this soluble retinal protein in vivo may accelerate photoreceptor degeneration in uveitis.
Collapse
Affiliation(s)
- S R Bae
- Department of Ophthalmology, Taejon St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, Korea
| |
Collapse
|
9
|
Abstract
In this study, we investigated whether retinal soluble proteins, such as interphotoreceptor retinoid-binding protein(IRBP), play a role in the induction of nitric oxide by macrophages in vitro. Cells from the murine macrophage cell line RAW 264.7 and rat and rabbit peritoneal macrophages were incubated in the presence of retinal soluble protein. The nitrite level in the cultured supernatant was evaluated for nitric oxide production using the Griess reaction. IRBP induced significant, dose-dependent nitrite production in both RAW 264.7 and rat peritoneal macrophages. Induction of inducible nitric oxide synthase (iNOS) by retinal proteins was inhibited by the iNOS-specific inhibitor, aminoguanidine, and the tyrosine inhibitor, genistein. These results show that soluble retinal proteins significantly induce nitric acid production by macrophages. Increased production of reactive oxygen species by macrophages in the presence of this soluble retinal protein in vivo may accelerate photoreceptor degeneration in uveitis.
Collapse
Affiliation(s)
- S R Bae
- Department of Ophthalmology, Taejon St. Mary's Hospital, College of Medicine, Catholic University of Korea, Korea
| |
Collapse
|