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2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)最新文献

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Comparative study on light-induced negative-bias stress stabilities in amorphous In-Ga-Zn-O thin film transistors with photoinduced transient spectroscopy 用光致瞬态光谱法比较非晶in - ga - zn - o薄膜晶体管的光致负偏置应力稳定性
Kazushi Hayashi, Mototaka Ochi, A. Hino, Hiroaki Tao, H. Goto, T. Kugimiya
A comparative study on light-induced negative-bias stress stabilities in amorphous In-Ga-Zn-O (a-IGZO) thin film transistors (TFTs) was performed by means of photoinduced transient spectroscopy (PITS). When the a-IGZO thin films were deposited with 4% O2 partial pressure (P/P), a dominant peak with a maximum of around 100 K was clearly observed from the sample. There was a flow rate of SiH4/N2O of 4/100 sccm for the ESL deposition, while the PITS spectra from the sample with a flow rate of SiH4/N2O of 6/150 sccm possessed a broader peak of around 115 K and an apparent shoulder of around 200-280 K was observed. This shoulder of around the 200-280 K was clarified when the a-IGZO thin film was deposited with an O2 P/P of 20 % In accordance with the changes in the electronic structures in the a-IGZO thin films due to the ESL deposition, the stability of the TFTs against the negative bias thermal Illumination stress (NBTIS) was degraded; the value of the Vth shift after the 2h-NBTIS test was increased from 2.5 to 6.0 V The decreasing the compensating acceptors and/or the increasing the hydrogen-related donors could be the origin of the negative Vth shift during the NBTIS test.
利用光致瞬态光谱(PITS)对非晶in - ga - zn - o (A - igzo)薄膜晶体管(TFTs)的光致负偏置应力稳定性进行了比较研究。当a- igzo薄膜在4% O2分压(P/P)下沉积时,样品明显观察到一个峰值在100 K左右的优势峰。ESL沉积的SiH4/N2O流速为4/100 sccm,而SiH4/N2O流速为6/150 sccm时,样品的PITS光谱在115 K附近有一个更宽的峰,在200-280 K附近有一个明显的肩。当O2 P/P为20%时,a-IGZO薄膜在200- 280k附近的肩部被澄清。由于ESL沉积导致a-IGZO薄膜电子结构的变化,tft对负偏置热照明应力(NBTIS)的稳定性下降;2h-NBTIS测试后的Vth位移值由2.5 V增加到6.0 V,补偿受体的减少和/或氢相关供体的增加可能是NBTIS测试期间负Vth位移的原因。
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引用次数: 0
In-cell capacitive touch panel structures and their readout circuits 单元内电容式触摸面板结构及其读出电路
Seung-Hwan Lee, Jae-Sung An, Seongkwan Hong, O. Kwon
This paper proposes an in-cell capacitive touch panel structure and a readout circuit (ROIC) to sense the variation in self-capacitance using a small number of sensing lines. The proposed touch panel structure sequentially senses the variation in self-capacitance by adding a thin-film transistor and a scan signal line into each touch sensor so that the number of sensing lines can be reduced. In addition, the proposed ROIC enhances the signal-to-noise ratio (SNR) by compensating for the stray capacitance. The simulation results show that the proposed ROIC achieves an SNR of 57 dB. Moreover, the number of sensing lines per inch is 6.7 and 230.8 using the proposed active self-capacitive sensing method and the advanced in-cell touch (AIT) technology, respectively. Therefore, the proposed active self-capacitive sensing method reduces the number of sensing lines by 97.10 % compared with the AIT technology, while maintaining high sensitivity and multi-touch sensing capability.
本文提出了一种单元内电容式触摸面板结构和一个读出电路(ROIC),利用少量的感应线来感应自电容的变化。所提出的触摸面板结构通过在每个触摸传感器中添加薄膜晶体管和扫描信号线来顺序地感知自电容的变化,从而减少感应线的数量。此外,所提出的ROIC通过补偿杂散电容来提高信噪比(SNR)。仿真结果表明,该ROIC的信噪比为57 dB。此外,采用所提出的主动自电容传感方法和先进的细胞内触摸(AIT)技术,每英寸的传感线数分别为6.7和230.8条。因此,与AIT技术相比,所提出的主动自电容传感方法在保持高灵敏度和多点触摸传感能力的同时,将传感线数减少了97.10%。
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引用次数: 11
Self-aligned metal double-gate junctionless p-channel low-temperature polycrystalline-germanium thin-film transistors with a thin germanium channel on a glass substrate 自对准金属双栅无结p沟道低温多晶锗薄膜晶体管,在玻璃衬底上有薄锗沟道
A. Hara, Yuya Nishimura, H. Ohsawa
Polyaystalline-germanium (poly-Ge) thin-film transistors (TFTs) are good candidates for next-generation TFTs for use in the backplane of flat-panel displays (FPDs). This is due to their superior electrical properties compared to those of Si and oxide semiconductors. However, poly-Ge shows a strong p-type characteristic; thus, it is not easy to reduce the leakage current using a single-gate (SG) structure. In this study, self-aligned metal double-gate (MeDG) junctionless (JL) p-channel (p-ch) low-temperature (LT) poly-Ge TFTs were fabricated on a glass substrate using a 15-nm-thick solid phase crystallized (SPC) poly-Ge film. Additionally, SG JL p-ch LT poly-Ge TFTs with 15-nm-thick SPC poly-Ge films were fabricated as reference TFTs. The self-aligned MeDG JL p-ch LT poly-Ge TFT shows superior performance compared to that of SG JL p-ch LT poly-Ge TFT.
聚锗薄膜晶体管(TFTs)是用于平板显示器(FPDs)背板的下一代TFTs的良好候选者。这是由于与硅和氧化物半导体相比,它们具有优越的电性能。而poly-Ge表现出较强的p型特征;因此,采用单栅(SG)结构不容易减小漏电流。在本研究中,使用15 nm厚的固相结晶(SPC)聚锗薄膜,在玻璃衬底上制备了自取向金属双栅(MeDG)无结(JL) p沟道(p-ch)低温(LT)聚锗tft。另外,制备了SG JL p-ch ltft和15nm厚SPC - gft作为参考tft。与SG JL p-ch LT - ge TFT相比,自对准的MeDG JL p-ch LT - ge TFT表现出更好的性能。
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引用次数: 0
Solar radiation forecast with machine learning 用机器学习预测太阳辐射
X. Shao, Siyuan Lu, H. Hamann
Renewable energy forecasting becomes increasingly important as the contribution of solar/wind power production to the electrical power grid constantly increases. Significant improvement in forecasting accuracy has been demonstrated by developing more sophisticated solar irradiance forecasting models using statistics and/or numerical weather predictions. In this presentation, we report the development of a machine-learning based multi-model blending approach for statistically combing multiple meteorological models to improve the accuracy of solar power forecasting. The system leverages upon multiple existing physical models for prediction including numerous atmospheric and cloud prediction models based on satellite imagery as well as numerical weather prediction (NWP) products.
随着太阳能/风能发电对电网的贡献不断增加,可再生能源预测变得越来越重要。利用统计数据和/或数值天气预报发展更精密的太阳辐照度预报模式,已显示预报精度有显著提高。在本报告中,我们报告了一种基于机器学习的多模型混合方法的发展,该方法用于统计组合多个气象模型,以提高太阳能预测的准确性。该系统利用多种现有的物理模型进行预测,包括基于卫星图像和数值天气预报(NWP)产品的众多大气和云预测模型。
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引用次数: 9
Evaluation of pH sensors using self-aligned four-terminal planar embedded metal double-gate low-temperature polycrystalline-silicon thin-film transistors on glass substrate 玻璃基板上自对准四端平面嵌入式金属双栅低温多晶硅薄膜晶体管的pH传感器评价
H. Ohsawa, Hitoshi Suzuki, S. Kuwano, A. Hara
This study presents an evaluation of pH sensors using self-aligned four-terminal planar embedded metal double-gate low-temperature polycrystalline-silicon thin-film transistors (TFTs) on a glass substrate. The voltage variation due to a change in pH is read as the variation in threshold voltage of the TFTs by connecting a TFT control gate to a glass electrode. Our experimental results confirm that these TFTs can be successfully used as pH sensors.
本研究提出了在玻璃基板上使用自对准四端平面嵌入式金属双栅低温多晶硅薄膜晶体管(TFTs)的pH传感器的评估。通过将TFT控制栅极连接到玻璃电极,将pH值变化引起的电压变化读取为TFT阈值电压的变化。我们的实验结果证实,这些tft可以成功地用作pH传感器。
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引用次数: 0
Hybrid-type temperature sensor using thin-film transistors generating rectangle output waveform — Operating confirmation by actual experiment 利用薄膜晶体管产生矩形输出波形的混合型温度传感器-经实际实验验证
Hisashi Hayashi, Katsuya Kito, Shuhei Kitajima, Toshimasa Hori, T. Matsuda, M. Kimura
We have developed a hybrid-type temperature sensor using thin-film transistors generating rectangle output waveform. The advantages of the hybrid-type temperature sensor are that the large temperature dependence of the off-leakage current can be utilized, and simultaneously only a digital circuit is required to count the digital pulse. However, the conventional hybrid-type sensor has a disadvantage that the pulse width is too small to count. Therefore, we have developed a new hybrid-type temperature sensor in order to enlarge the pulse width. Although we previously confirmed the operation by circuit simulation, particularly in this presentation, we have made an actual circuit and observed a rectangle output waveform, namely, confirmed the correct operation by actual experiment.
我们开发了一种利用薄膜晶体管产生矩形输出波形的混合型温度传感器。混合型温度传感器的优点是可以利用断漏电流对温度的较大依赖性,同时只需要一个数字电路就可以对数字脉冲进行计数。然而,传统的混合型传感器有一个缺点,即脉冲宽度太小而无法计数。因此,我们开发了一种新型的混合型温度传感器,以扩大脉冲宽度。虽然我们之前是通过电路仿真来确认操作的,特别是在这次的presentation中,我们做了一个实际的电路,观察到一个矩形的输出波形,即通过实际的实验来确认正确的操作。
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引用次数: 1
Characteristics of amorphous In-Ga-Zn-O thin-film-transistors with channel layer deposited by bias sputtering 偏置溅射沉积非晶In-Ga-Zn-O薄膜晶体管的特性
Man Zhang, Xiang Xiao, Xin Ju, Xiaodong Zhang, Shengdong Zhang
The influence of substrate bias during sputtering on the amorphous indium-gallium-zinc-oxide (a-IGZO) film and back-channel-etch (BCE) a-IGZO TFT is investigated. A mediated substrate bias is benefit to the improvement of a-IGZO film. The BCE a-IGZO TFT with mediate substrate bias of -90 V exhibits good performances with a field effect mobility (μfe) of 7.45 cm2/V·s, a subthreshold swing (SS) of 0.52 V/Dec and an Ion/Ioff current ratio of 109. The gate-bias stress stability is improved by substrate bias with ΔVth was 1.76 V under PBS and -0.88 V under NBS.
研究了溅射过程中衬底偏压对非晶铟镓锌氧化物(a-IGZO)薄膜和反通道蚀刻(BCE) a-IGZO TFT的影响。介导的衬底偏压有利于改善A - igzo薄膜的性能。中间衬底偏置为-90 V的BCE a- igzo TFT具有良好的场效应迁移率(μfe)为7.45 cm2/V·s,亚阈值摆幅(SS)为0.52 V/Dec,离子/开关电流比为109。衬底偏置ΔVth在PBS下为1.76 V,在NBS下为-0.88 V,提高了栅偏置应力稳定性。
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引用次数: 0
Ultrahigh-performance poly-si thin film transistor using multi-line beam continuous-wave laser lateral crystallization 采用多线光束连续波激光横向结晶的超高性能多晶硅薄膜晶体管
Thuy Nguyen, Mitsuhisa Hiraiwa, T. Hirata, S. Kuroki
(100) surface oriented poly-Si film on glass substrate has been a key requirement to realize high performance low temperature poly-Si thin film transistors (LTPS-TFTs). Using multi-line beam (MLB) continuous-wave laser lateral crystallization (CLC) with overlapping, (100)-dominantly oriented poly-Si film was realized with average grain size of approximately 20 μm × 2 μm in normal surface direction. Ultrahigh-performance LTPS-TFTs were achieved with a very high electron field effect mobility of μFE = 940 cm2/Vs, a high ON/OFF ratio of 105, threshold voltage of 0 V, and subthreshold slope of 0.12 V/dec. This approach is nearly comparable to single crystal Si transistor.
(100)玻璃衬底表面取向多晶硅薄膜是实现高性能低温多晶硅薄膜晶体管(LTPS-TFTs)的关键要求。采用多线束(MLB)连续波激光横向结晶(CLC)技术,实现了(100)显性取向的多晶硅膜,其在法向平均晶粒尺寸约为20 μm × 2 μm。高电子场效应迁移率μFE = 940 cm2/Vs,高开/关比105,阈值电压为0 V,亚阈值斜率为0.12 V/dec,实现了超高性能的ltps - tft。这种方法几乎可以与单晶硅晶体管相媲美。
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引用次数: 1
Recent progress on perovskite solar cells and our materials science 钙钛矿太阳能电池和材料科学的最新进展
A. Wakamiya
Perovskite solar cells represent cost-effective next generation printable photovoltaics. In a relatively short period, power conversion efficiencies (PCEs) in such cells have been substantially increased, mainly due to improvements of the fabrication protocols for the perovskite layer as well as the development of new materials for buffer layers. In this presentation, the recent progress and perspective on this promising new type of photovoltaics are introduced, including our approaches toward development of high PCE cells in terms of materials science.
钙钛矿太阳能电池代表了具有成本效益的下一代可印刷光伏电池。在相对较短的时间内,这种电池的功率转换效率(pce)已经大大提高,这主要是由于钙钛矿层制造工艺的改进以及缓冲层新材料的开发。在本报告中,介绍了这种有前途的新型光伏电池的最新进展和前景,包括我们在材料科学方面开发高PCE电池的方法。
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引用次数: 1
Investigation of high efficiency methyl ammonium lead halide perovskite-Si tandem solar cell 高效甲基铵铅卤化钙钛矿硅串联太阳能电池的研究
S. M. Iftiquar, J. Yi
Methyl ammonium lead halide (CH3NH3PM3) is one of the most promising organic inorganic lead halide perovskite material that can be used as an active layer in photovoltaic solar cell. Its high photo sensitivity, carrier lifetime, diffusion length are few of the interesting characteristics useful in a such a device. We theoretically investigated a tandem solar cell, consisting of a perovskite type top cell and a crystalline silicon bottom cell and observed that the device efficiency can be as high as 24.9%.
甲基铵卤化铅(CH3NH3PM3)是最有前途的有机无机卤化铅钙钛矿材料之一,可作为光伏太阳能电池的活性层。它的高光敏度,载流子寿命,扩散长度是一些有趣的特点,在这样一个装置中有用的。我们从理论上研究了由钙钛矿型顶部电池和晶体硅型底部电池组成的串联太阳能电池,并观察到该装置的效率可高达24.9%。
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引用次数: 0
期刊
2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)
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