• 전자공학회논문지
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• 제52권11호
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• pp.29-35
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• 2015

다결정 실리콘으로 구성된 금속-반도체-금속(MSM) 구조의 광검출기의 광 응답 특성을 개선시키기 위해 중수소를 사용한 후속 공정을 행하였다. 다결정 실리콘 내 중수소 결합 형성 방법에 따른 광검출기의 특성 변화를 전기적 측정을 통해 비교하였다. 광검출기는 Schottky 접합 특성을 갖기 위해 Al/Ti 전극 금속이 사용되었다. 본 연구에서는 광 흡수 영역인 다결정 실리콘 내에 중수소 결합을 형성시켜 다결정 실리콘 내에 존재하는 결함을 효과적으로 passivation하여 결함밀도를 감소시키고자 한다. 후속 중수소 공정으로는 열처리 확산 방법과 이온 주입 방법을 각각 사용하였다. 중수소 열처리 확산 방법을 통해서 중수소는 다결정 실리콘의 표면 근처에 대부분 존재하였다. 다결정 실리콘의 표면은 광 흡수가 일어나는 부분이므로 중수소의 결합을 통해 광 응답 특성이 개선됨을 확인하였다. 중수소 이온 주입 방법을 통해서는 중수소를 다결정 실리콘 내부로 쉽게 분포시킬 수 있지만 다결정 실리콘 표면 근처에 결함을 만들 수 있어 광 응답 특성을 저하시키는 원인이 되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.497-500
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• 2001

Due to their better photosensitivity in X-ray, the amorphous selenium based photoreceptor is widely used on the X-ray conversion materials. It was possible to control the charge carrier transport of amorphous selenium by suitably alloying a-Se with other elements(e,g. As, Cl). The charge transport properties of amorphous Selenium is decided on hole which is induced from metal to selenium in metal-selenium junction and which is transferred in a-Se bulk. This phenomenon is resulted of changing electric field owing to increasing of space charge by deep trap of a-Se bulk. In this paper, We dopped the chlorine to compensate deep hole trap and deposited blocking layer using dielectric material to prevent from increasing space charge for injection charge between metal electrode and a-Se layer. We compared space charge and the decreasing of trap density through measuring dark and photo current.

• 한국콘텐츠학회논문지
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• 제17권11호
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• pp.252-263
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• 2017

본 연구는 이용과 충족 이론을 기반으로 인스타그램 사진 공유 행동에 영향을 미치는 영향 요인들을 파악하기 위한 목적으로 수행되었다. 본 연구는 인스타그램을 이용하고 있으며, 최근 3개월 이내에 인스타그램에 사진을 공유한 경험이 있는 356명의 이용자를 대상으로 분석을 실시하였다. 분석 방법은 SPSS 19.0과 AMOS 21.0을 활용하여 빈도분석, 기술통계, 신뢰도 검증, 확인적 요인 분석, 구조 모형 분석을 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 소통이 인스타그램 사진 공유 행동에 가장 많은 영향을 미치는 것으로 나타났다. 둘째, 오락 추구가 인스타그램 사진 공유 행동에 정(+)적인 영향을 미치는 것으로 나타났다. 셋째, 자기 표현이 인스타그램 사진 공유 행동에 정(+)적인 영향을 미치는 것으로 나타났다. 넷째, 서비스 이용자 신뢰가 인스타그램 사진 공유 행동에 정(+)적인 영향을 미치는 것으로 나타났다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2004년도 하계종합학술대회 논문집(2)
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• pp.605-608
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• 2004

A $Pt/Al_xGa_{l-x}N$ Schottky type Ultra-violet photodetector was modeled and simulated using the commercial SILVACO software program. In the carrier transport, we applied field model and other analytic model to determine the electron saturation velocity and low field mobility for GaN and $Al_xGa_{l-x}N$. A C-Interpreter function was defined to described the mole-fraction for the ternary compound semiconductor such as $Al_xGa_{l-x}N$. As comparing the simulated and experimental results, we found that the simulated result for type-1 has $15.9 nA/cm^2$ of leakage current at 5V. We confirmed a good agreement of photo-current in the UV Photo-detector, while applying the absorption coefficient and reflective index of active $Al_xGa_{l-x}N$ and other layers. There had been an intensive search for the proper refractive indices of the layers.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 추계학술대회 논문집 Vol.19
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• pp.166-167
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• 2006

Dendrimers represent a new class of synthetic macromolecules characterized by a regularly branched treelike structure. Multiple branching yields a large number of chain ends that distinguish dendrimers from conventional star-like polymers and microgels. The azobenzene dendrimer is one of the dendrimeric macromolecules that include the azo-group exhibiting a photochromic character. Due to the presence of the charge transfer element of the azo-group and its rod-shaped structure, these compounds are expected to have potential interest in electronics and photoelectronics, especially in nonlinear optics. In the present paper, we give pressure stimulation to organic thin films and detect the induced displacement current. Functional photoisometrization organic molecular the photo-stimulus to organic monomolecular L-films and LB films of dendrimer and 8A5H were performed. The 8A5H organic monolayer in case of pressure stimulus occurred that positive course but in case of the photo-stimulus compared positive and negative. It is assumed that generation forms of displacement current were measured when photo-stimulus for Impression.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.964-967
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• 2009

A new hybrid-type touch screen panel (TSP) has been developed based on a-Si:H TFT which can detect the change of both $C_{LC}$ and photo-current. This TSP can detect the difference of $C_{LC}$ between touch and no-touch states in unfavorable conditions such as dark ambient light and shadows. The hybrid TSP sensor consists of a detection area which includes one TFT for photo sensing and two TFTs for amplification. Compared to a single internal capacitive TSP or an optical sensing TSP, this new proposed hybrid-type TSP enables larger sensing margin due to embedding of both optical and capacitive sensors.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.572-575
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• 2008

Photo leakage characteristics of a-Si:H TFT were obtained for the illuminations from various backlight sources and the results were compared and analyzed in terms of the photoelectric properties of light. The analysis shows that the photocurrents are related to the wavelengths of the peak intensities of the spectrums of light sources.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1082-1085
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• 2006

We proposed dual mode pixel circuit in AMOLED (active matrix organic light emitting device). After light emitting period of OLED, we used it as a photo sensor. We measured photo current of OLED and simulated the proposed pixel circuit to verify it's function of dual mode, that is lighting and sensing.

• 전력전자학회논문지
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• 제19권1호
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• pp.51-56
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• 2014

PV cell modeling is necessary both for software and hardware simulators in analyzing and testing the performance of PV generation systems. Unique I-V curve of a PV cell identifies its own characteristics by electrical equivalent model that is composed of diode constants ($I_o$, $v_t$), photo-generated current ($I_{ph}$), series resistance ($R_s$), and shunt resistance ($R_{sh}$). Photo-generated current can be easily estimated since it is proportional to irradiation level. However, other electrical parameters should be solved from the manufacturer's data sheet that is consisted with three remarkable operating points such as open circuit voltage ($V_{oc}$), short circuit current ($I_{sc}$), and maximum power voltage/current ($V_{MPP}/I_{MPP}$). This paper explains and analyzes mathematical process of a novel PV cell modeling algorithm that was proposed by the authors with the name of "K-algorithm".

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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• pp.281-284
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• 2004

Photo-induced memory effect of an organic light-emitting diode(OLED) composed of a hydrazone-derivative(DBAH) dispersed in bis-phenol-A type polycarbonate polymer(PCA) in the presence of thio-Michler's ketone, was investigated by the measuring of the current density and luminance at the various conditions. After the light exposure, the current of the OLED was decreased approximately one order, and the luminance of the OLED also decresed. This memory effct was erasable by heating the OLED to the temperature higher than the glass transition temperature(Tg). As shown in this result, we found the memory effect was erased by heating and returned to its original state in the hole injecting layer(HIL) of the OLED. A series of these phenomena was suggested the possibility of the application to the imaging plate.