TY - CHAP AU - Gu, Changfeng AU - Dai, Qinyong AU - Zhou, Juanjuan AU - Song, Xinyu AU - Zhou, Zhuoli AU - Lu, Chengyu AU - Peng, Yingquan ED - Dong, Xinyong ED - Peng, Yingquan TI - Recent Development in Electro-thermal Modeling and Simulation of OLEDs T2 - Proceedings of 2019 International Conference on Optoelectronics and Measurement PB - Springer-Verlag Singapore CY - Singapore SN - 9789813341098 T3 - Lecture Notes in Electrical Engineering, ISSN 1876-1100 ; 726. PY - 2021 SP - 255 EP - 262 PG - 8 DO - 10.1007/978-981-33-4110-4_31 UR - https://m2.mtmt.hu/api/publication/32545006 ID - 32545006 LA - English DB - MTMT ER - TY - JOUR AU - Kollár, Ernő AU - Pohl, László AU - Poppe, András AU - Kohári, Zsolt TI - Nonlinear electro-thermal and light output modeling and simulation of OLEDs JF - PERIODICA POLYTECHNICA-ELECTRICAL ENGINEERING AND COMPUTER SCIENCE J2 - PERIOD POLYTECH ELECTR ENG COMP SCI VL - 58 PY - 2014 IS - 2 SP - 43 EP - 53 PG - 11 SN - 2064-5260 DO - 10.3311/PPee.7477 UR - https://m2.mtmt.hu/api/publication/2662740 ID - 2662740 AB - Lighting application of Organic Light Emitting Diodes (OLEDs) has been forecasted and such applications appear already in the high end segment of the market. These devices should provide homogeneous luminance – homogeneity is one of the quality metrics of such devices. Local light generation depends on both the local temperature and the local voltage drop across the light emitting polymer(s) in the device. Due to the large area of these devices the coupled optical, electrical and thermal simulation problem is of distributed nature. Electrical characteristics of organic semiconductor materials used in OLED devices are nonlinear, and their nonlinear temperature-dependence is significant. Measurement and temperature-dependent electrical and optical modeling of OLEDs is presented in this study. The paper addresses the special needs of OLEDs in distributed electro-thermal field simulation. These needs are not handled appropriately yet in the widely used, commercially available simulation tools. However the latest version of our SUNRED field solver algorithm is capable of handling these coupled, non-linear optical-electrical-thermal problems. The new features of the algorithm are demonstrated by modeling some research OLED samples available to us in the Fast2Light project – this way simulation results are compared against measured data. The results suggest that the models and the simulation tool can be used well in OLED design. LA - English DB - MTMT ER - TY - THES AU - Timár, András TI - Logi-termikus szimuláció sztenderd tervező rendszerekben PB - Budapesti Műszaki és Gazdaságtudományi Egyetem PY - 2013 UR - https://m2.mtmt.hu/api/publication/2944137 ID - 2944137 N1 - Megjegyzés-25283808 Budapesti M˝uszaki és Gazdaságtudományi Egyetem Villamosmérnöki és Informatikai Kar Elektronikus Eszközök Tanszéke Megjegyzés-25283815 Budapesti Műszaki és Gazdaságtudományi Egyetem Villamosmérnöki és Informatikai Kar Elektronikus Eszközök Tanszéke LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kohári, Zsolt AU - Kollár, Ernő AU - Pohl, László AU - Poppe, András TI - Nonlinear electro-thermal modeling and field-simulation of OLEDs for lighting applications II: Luminosity and failure analysis JF - MICROELECTRONICS JOURNAL J2 - MICROELECTRON J VL - 44 PY - 2013 IS - 11 SP - 1011 EP - 1018 PG - 8 SN - 0026-2692 DO - 10.1016/j.mejo.2012.05.015 UR - https://m2.mtmt.hu/api/publication/2683473 ID - 2683473 LA - English DB - MTMT ER - TY - CHAP AU - Kohári, Zsolt AU - Pohl, László AU - Poppe, András ED - Paul, Wesling ED - Kathe, Ericson TI - How thermal environment affects OLEDs' operational characteristics T2 - 2012 28th Annual IEEE Semiconductor Thermal Measurement and Management Symposium (SEMI-THERM) PB - IEEE CY - New York, New York SN - 9781467311113 T3 - PROCEEDINGS, IEEE SEMICONDUCTOR THERMAL MEASUREMENT AND MANAGEMENTSYMPOSIUM, ISSN 1065-2221 PY - 2012 SP - 331 EP - 336 PG - 6 DO - 10.1109/STHERM.2012.6188869 UR - https://m2.mtmt.hu/api/publication/2683176 ID - 2683176 AB - In recent years great effort has been put into development of organic light emitting diodes (OLEDs) worldwide. Among many concerns of developers is heat-removal from the thin film structure of the active layers of OLEDs which are typically realized on low thermal conductivity substrates such as glass or polymer foils. The other issue is to provide the OLEDs with transparent, yet high electrical conductivity electric power supply structure, therefore metallic shunting grids are added to the layer stack of OLEDs. These two major issues necessitate self-consistent electro-thermal simulation of large area OLEDs in which the temperature dependent I-V characteristics of the light emitting polymer layers are also considered. In this paper we discuss details of our 2.5D field-solver algorithm extended with such capabilities which was developed for the European funded Fast2Light project. The paper also presents a measurement and simulation example for a glass-based research OLED sample. LA - English DB - MTMT ER - TY - CHAP AU - Pohl, László AU - Kollár, Ernő ED - Bernard, Courtois ED - Marta, Rencz TI - Extension of the SUNRED algorithm for electro-thermal simulation and its application in failure analysis of large area (organic) semiconductor devices T2 - Proceedings of the 17th International Workshop on THERMal INvestigation of ICs and Systems (THERMINIC'11) PB - EDA Publishing Association CY - Grenoble SN - 9781457707780 PY - 2011 SP - 195 EP - 200 PG - 6 UR - https://m2.mtmt.hu/api/publication/2668689 ID - 2668689 LA - English DB - MTMT ER -