Versatile Solution‐Processed Organic–Inorganic Hybrid Superlattices for Ultraflexible and Transparent High‐Performance Optoelectronic Devices

Crystalline or amorphous metal oxides are widely used in various optoelectronic devices as key components, such as transparent conductive electrodes, dielectrics or semiconducting active layers for thin‐film transistor (TFT) backplanes in large‐area displays, photovoltaics, and light‐emitting diodes...

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Bibliographic Details
Published in:Advanced functional materials 2021-07, Vol.31 (29), p.n/a
Main Authors: Le, Minh Nhut, Baeg, Kang‐Jun, Kim, Kyung‐Tae, Kang, Seung‐Han, Choi, Byung Doo, Park, Chan‐Yong, Jeon, Seong‐Pil, Lee, Sol, Jo, Jeong‐Wan, Kim, Seonhyoung, Park, Jun‐Gu, Ho, Dongil, Hong, Jongin, Kim, Miso, Kim, Han‐Ki, Kim, Choongik, Kim, Kwanpyo, Kim, Yong‐Hoon, Park, Sung Kyu, Kim, Myung‐Gil
Format: Article
Language:English
Subjects:
Backplanes
Crystal structure
Crystallinity
Flexible components
flexible optoelectronics
Gallium
Indium
Inorganic materials
Materials science
Metal oxides
Optoelectronic devices
Oxide coatings
Photonic band gaps
Photovoltaic cells
Semiconductor devices
solution process
Substrates
Superlattices
Thin film transistors
Tin oxides
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Summary:Crystalline or amorphous metal oxides are widely used in various optoelectronic devices as key components, such as transparent conductive electrodes, dielectrics or semiconducting active layers for thin‐film transistor (TFT) backplanes in large‐area displays, photovoltaics, and light‐emitting diodes. Although crystalline inorganic materials demonstrate outstanding optoelectronic performance, owing to their wide bandgaps, large conductivities, and high carrier mobilities, their inherent brittleness makes them vulnerable to mechanical stress, thereby limiting the use of metal‐oxide films in emerging flexible electronic applications. In this study, stress‐diffusive organic–inorganic hybrid superlattice nanostructures are developed to overcome the mechanical limitation of crystalline oxides and to provide high mechanical stability to metal‐oxide semiconductors. In particular, hybrid transparent superlattice electrodes based on crystalline indium–tin oxide exhibit high electrical conductivities of up to 555 S cm–1 (resistance variation < 3%) and effectively reduce the mechanical stress on the inorganic layer (up to 10 000 bending cycles with a radius of 1 mm). Furthermore, to ensure the viability of the hybrid superlattice flexible electronics, all solution‐processed superlattice crystalline indium–gallium‐oxide TFTs are implemented on a thin (≈5 µm) polyimide substrate, providing highly robust and excellent electrical performance (average mobility of 7.6 cm2 V–1 s–1). A facile, high‐throughput, solution‐processed industrial standard metal‐oxide material is fabricated for flexible optoelectronic devices. The huge demand for flexible electronic devices needs a new class of materials. Instead of spending time on not well‐studied materials, the solution‐processed hybrid superlattice with industrial standard metal‐oxide and organic materials can be successfully applied in flexible electronic devices.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202103285