ساخت و مشخصه‌یابی دیودهای نورگسیل پلیمری دو لایه با ساختار ITO/PEDOT:PSS/MEH-PPV/Al

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

1 فارغ الحصیل از دانشگاه شهید چمران اهواز

2 دانشگاه شهید چمران اهواز

3 عضو هیات علمی گروه فیزیک دانشگاه شهید چمران اهواز

چکیده

در این مقاله، گزارش ساخت و مشخصه‌یابی دیودهای نورگسیل پلیمری (PLED) دو‌لایه با ساختار ITO/PEDOT:PSS/MEH-PPV/Al، با هدف کاهش ولتاژ روشن شدن، ارائه می‌شود. در این کار، لایۀ PEDOT:PSS به-عنوان لایۀ تزریق‌کنندۀ حفره با سرعت rpm 2000 و لایۀ MEH-PPV به‌عنوان مادۀ فعال با چهار سرعت لایه‌نشانی متفاوت و به‌روش لایه‌نشانی چرخشی، لایه‌نشانی شد. اثر تغییر ضخامت لایۀ MEH-PPV بر روی خواص سطحی لایه‌ها، خواص جذبی لایه‌ها، گاف نوری و از همه مهمتر، ولتاژ روشنایی دیود، بررسی شد. در نهایت دیودی که با مشخصات ITO/PEDOT:PSS(2000 rpm)/MEH-PPV(6000 rpm)/Al(165 nm) ساخته شد، کمترین ولتاژ روشنایی، یعنی 1/7 ولت، را داشت. نور گسیل شده در بازه nm 550 تا nm 650 و به نارنجی دیده شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Fabrication and characterization of two-layered polymer light emitting diode with a structure of ITO/PEDOT:PSS/ MEH:PPV/Al

نویسندگان [English]

  • Sheida Namniha 1
  • mohammad sabaian 2
چکیده [English]

In this article, we present fabrication and characterization of two-layered polymer light emitting diode (PLED) with a structure of ITO/PEDOT:PSS/MEH:PPV/Al which emits a orange-colored light, with the aim of reduction of lightening voltage. In this work, the PEDOT:PSS layer, as hole injection layer, was coated with spin coating method and a rotating speed of 2000 rpm and the MEH:PPV layer, as an active layer (emission layer), was coated with four rotating speeds. The impact of change in layer thickness on the surface roughness, optical absorption, and most importantly, the lightening voltage was investigated. Eventually, a PLED with a structure of ITO/PEDO:PSS(2000 rpm)/MEH:PPV(6000 rpm)/Al (165 nm) was selected as the optimum structure with a minimum lightening voltage of 7.1 V. The emission light ranged from 550 nm to 650 nm and was observed as an orange light.

کلیدواژه‌ها [English]

  • polymer light emitting diodes
  • thickness of active layer
  • structural properties
  • optical properties

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