Indium-tin-zinc oxide(ITZO)thin-film transistor(TFT)technology holds promise for achieving high mobility and offers significant opportunities for commercialization.This paper provides a review of progress made in impr...Indium-tin-zinc oxide(ITZO)thin-film transistor(TFT)technology holds promise for achieving high mobility and offers significant opportunities for commercialization.This paper provides a review of progress made in improving the mobility of ITZO TFTs.This paper begins by describing the development and current status of metal-oxide TFTs,and then goes on to explain the advantages of selecting ITZO as the TFT channel layer.The evaluation criteria for TFTs are subsequently introduced,and the reasons and significance of enhancing mobility are clarified.This paper then explores the development of high-mobility ITZO TFTs from five perspectives:active layer optimization,gate dielectric optimization,electrode optimization,interface optimization,and device structure optimization.Finally,a summary and outlook of the research field are presented.展开更多
This year marks the tenth anniversary of the State Key Laboratory of Advanced Displays and Optoelectronics Technologies(SKLADOT)at the Hong Kong University of Science and Technology(HKUST).The predecessor of SKLADOT w...This year marks the tenth anniversary of the State Key Laboratory of Advanced Displays and Optoelectronics Technologies(SKLADOT)at the Hong Kong University of Science and Technology(HKUST).The predecessor of SKLADOT was the Center for Display Research(CDR)which was started in 1995.Thus display research has a long history at HKUST.展开更多
In this article,we review recently achieved Kerr effect progress in novel liquid crystal（LC） material：vertically aligned deformed helix ferroelectric liquid crystal（VADHFLC）.With an increasing applied electric fi...In this article,we review recently achieved Kerr effect progress in novel liquid crystal（LC） material：vertically aligned deformed helix ferroelectric liquid crystal（VADHFLC）.With an increasing applied electric field,the induced inplane birefringence of LCs shows quadratic nonlinearity.The theoretical calculations and experimental details are illustrated.With an enhanced Kerr constant to 130 nm/V2,this VADHFLC cell can achieve a 2π modulation by a small efficient electric field with a fast response around 100 μs and thus can be employed in both display and photonics devices.展开更多
By exploiting ion transport phenomena in a soft and flexible discrete channel,liquid material conductance can be controlled by using an electrical input signal,which results in analog neuromorphic behavior.This paper ...By exploiting ion transport phenomena in a soft and flexible discrete channel,liquid material conductance can be controlled by using an electrical input signal,which results in analog neuromorphic behavior.This paper proposes an ionic liquid(IL)multistate resistive switching device capable of mimicking synapse analog behavior by using IL BMIM FeCL_(4) and H_(2)O into the two ends of a discrete polydimethylsiloxane(PDMs)channel.The spike rate-dependent plasticity(SRDP)and spike-timing-dependent plasticity(STDP)behavior are highly stable by modulating the input signal.Furthermore,the discrete channel device presents highly durable performance under mechanical bending and stretching.Using the obtained parameters from the proposed ionic liquid-based synaptic device,convolutional neural network simulation runs to an image recognition task,reaching an accuracy of 84%.The bending test of a device opens a new gateway for the future of soft and flexible brain-inspired neuromorphic computing systems for various shaped artificial intelligence applications.展开更多
Fiber-optic sensors have been developed to monitor the structural vibration with advantages of high sensitivity,immunity to electromagnetic interference(EMI),flexibility,and capability to achieve multiplexed or distri...Fiber-optic sensors have been developed to monitor the structural vibration with advantages of high sensitivity,immunity to electromagnetic interference(EMI),flexibility,and capability to achieve multiplexed or distributed sensing.However,the current fiber-optic sensors require precisely polarized coherent lasers as the lighting sources,which are expensive in cost and suffer from the power supply issues while operating at outdoor environments.This work aims at solving these issues,through developing a fully self-powered,natural-light-enabled approach.To achieve that,a spring oscillator-based triboelectric nanogenerator(TENG),a polymer network liquid crystal(PNLC),and an optical fiber were integrated.The external vibration drove the PNLC to switch its transparency,allowing the varia-tion of the incident natural light in the optical fiber.Compared with the majority of conventional TENG-based active vibration sensors,the developed paradigm does not suffer from the EMI,without requirements of the signal preamplifica-tion which consumes additional energy.The vibration displacement monitoring was performed to validate the sensing effectiveness of the developed paradigm.展开更多
基金financially supported in part by Shenzhen Municipal Research Program(Grant NO.SGDX20211123145404006)in part by National Natural Science Foundation of China(Grant NO.62274111)+1 种基金in part by Guangdong Basic and Applied Basic Research Foundation(Grant NO.2021A1515011858)in part by Innovation and Technology Fund of Hong Kong(Grant NO.GHP/018/21SZ)。
文摘Indium-tin-zinc oxide(ITZO)thin-film transistor(TFT)technology holds promise for achieving high mobility and offers significant opportunities for commercialization.This paper provides a review of progress made in improving the mobility of ITZO TFTs.This paper begins by describing the development and current status of metal-oxide TFTs,and then goes on to explain the advantages of selecting ITZO as the TFT channel layer.The evaluation criteria for TFTs are subsequently introduced,and the reasons and significance of enhancing mobility are clarified.This paper then explores the development of high-mobility ITZO TFTs from five perspectives:active layer optimization,gate dielectric optimization,electrode optimization,interface optimization,and device structure optimization.Finally,a summary and outlook of the research field are presented.
文摘This year marks the tenth anniversary of the State Key Laboratory of Advanced Displays and Optoelectronics Technologies(SKLADOT)at the Hong Kong University of Science and Technology(HKUST).The predecessor of SKLADOT was the Center for Display Research(CDR)which was started in 1995.Thus display research has a long history at HKUST.
基金The funding for the State Key Laboratory on Advanced Displays and Optoelectronics Technologies
文摘In this article,we review recently achieved Kerr effect progress in novel liquid crystal（LC） material：vertically aligned deformed helix ferroelectric liquid crystal（VADHFLC）.With an increasing applied electric field,the induced inplane birefringence of LCs shows quadratic nonlinearity.The theoretical calculations and experimental details are illustrated.With an enhanced Kerr constant to 130 nm/V2,this VADHFLC cell can achieve a 2π modulation by a small efficient electric field with a fast response around 100 μs and thus can be employed in both display and photonics devices.
基金supported by the National Research Foundation of Korea(NRF)funded by the Ministry of Education(2019R1A6A1A10072987)the Korean goverment(MSIP)(2020R1A2C101433),The authors appreciate the support by the State Key Laboratory on Advanced Displays and Optoelectronics Technologies HKUST for material processing and characterization。
文摘By exploiting ion transport phenomena in a soft and flexible discrete channel,liquid material conductance can be controlled by using an electrical input signal,which results in analog neuromorphic behavior.This paper proposes an ionic liquid(IL)multistate resistive switching device capable of mimicking synapse analog behavior by using IL BMIM FeCL_(4) and H_(2)O into the two ends of a discrete polydimethylsiloxane(PDMs)channel.The spike rate-dependent plasticity(SRDP)and spike-timing-dependent plasticity(STDP)behavior are highly stable by modulating the input signal.Furthermore,the discrete channel device presents highly durable performance under mechanical bending and stretching.Using the obtained parameters from the proposed ionic liquid-based synaptic device,convolutional neural network simulation runs to an image recognition task,reaching an accuracy of 84%.The bending test of a device opens a new gateway for the future of soft and flexible brain-inspired neuromorphic computing systems for various shaped artificial intelligence applications.
基金This work was funded by HKSAR the Research Grants Council Early Career Scheme(Grant no.24206919)HKSAR Innovation and Technology Fund(Grant no.ITS/085/18)TencentUniversityRelationsProgramme(contract no.T-576-INV-20200507-01).
文摘Fiber-optic sensors have been developed to monitor the structural vibration with advantages of high sensitivity,immunity to electromagnetic interference(EMI),flexibility,and capability to achieve multiplexed or distributed sensing.However,the current fiber-optic sensors require precisely polarized coherent lasers as the lighting sources,which are expensive in cost and suffer from the power supply issues while operating at outdoor environments.This work aims at solving these issues,through developing a fully self-powered,natural-light-enabled approach.To achieve that,a spring oscillator-based triboelectric nanogenerator(TENG),a polymer network liquid crystal(PNLC),and an optical fiber were integrated.The external vibration drove the PNLC to switch its transparency,allowing the varia-tion of the incident natural light in the optical fiber.Compared with the majority of conventional TENG-based active vibration sensors,the developed paradigm does not suffer from the EMI,without requirements of the signal preamplifica-tion which consumes additional energy.The vibration displacement monitoring was performed to validate the sensing effectiveness of the developed paradigm.
