مقدمة OLED

The basic structure of OLED is a thin and transparent semiconductor indium tin oxide (ايتو), which is connected to the positive pole of electric power, and another metal cathode, which is wrapped into a sandwich structure. The whole structure includes: hole transport layer (HTL), luminescence layer (EL) and electron transport layer (ETL). When the power supply to the appropriate voltage, the positive electrode hole and the cathode charge will combine in the luminous layer, produce brightness, according to the formula of the red, green and blue RGB primary colors, constitute the basic color. OLED is characterized by its own luminescence, the different from TFTLCD which requires backlight, so its visibility and brightness are both high, followed by low voltage demand and high power saving efficiency, coupled with fast response, light weight, thin thickness, simple structure, low cost, etc., it is regarded as one of the most promising products in the 21st century.

The luminescence principle of organic luminescent diodes is similar to that of inorganic luminescent diodes. When the component is subjected to DirectCurrent; When the DC) derived forward bias voltage is added, the external voltage energy will drive the Electron (Electron) and Hole to be injected by the cathode and anode respectively. When the two meet and combine in conduction, the so-called electron-holecapture is formed. When a chemical molecule is excited by external energy, if ElectronSpin and ground state electron pair, it is a Singlet, and the light it emits is called Fluorescence. On the contrary, if the excited state electron and the ground state electron spin are unpaired and parallel, it is called Triplet, and the light released by it is called phosphorescence

When the state of the electronic location by the excited state of high-energy order returned to the steady low order, its energy will respectively by the photon (LightEmission) or thermal energy (HeatDissipation), in which part of the photons can be used as a display; The theoretical limit of the luminous efficiency of pm-oled components is only 25%, since the organic fluorescent materials cannot observe the tri-state phosphorescence at room temperature.

The principle of pm-oled luminescence is to convert the released energy into photons by using the material energy order difference, حتى نتمكن من اختيار المادة المناسبة كطبقة مضيئة, أو خلط الصبغة في الطبقة المضيئة للحصول على اللون المضيء الذي نحتاجه. بالإضافة إلى ذلك فإن التفاعل العام بين الإلكترونات والفجوات يحدث خلال عشرات النانوثواني (نانوثانية), لذا فإن سرعة استجابة شاشة PM-OLED سريعة جدًا.

الهيكل النموذجي لشاشة PM-OLED. PM-OLED النموذجية على ركيزة زجاجية, ايتو (أكسيد القصدير والإنديوم; أكسيد القصدير والإنديوم) الأنود (الأنود) وطبقة العضوية المضيئة (طبقة المادة المضيئة) والكاثود (الكاثود), من بينهم, الأنود الشفاف الرقيق ITO والكاثود المعدني مثل الساندويتش حيث يتم حشر طبقة العضوية المضيئة بينهما, عند حقن الجهد للفجوات (فجوة) من الأنود والكاثود إلى الإلكترونات (Electron) في الطبقة العضوية المضيئة, تحفيز المادة العضوية وإصدار الضوء.

حالياً, the multi-layer pm-oled structure with better luminous efficiency and widely used is required to produce HoleInjectLayer expect glass substrate, anode and cathode electrode and organic luminous layer. HIL) and HoleTransportLayer. HTL, electronic transport layer; ETL and electronic injector layer; EIL) structure, and the transport layer between the electrode and to set up the insulation layer, so the thermal evaporation (Evaporate) processing difficulty relatively increased, the production process is complicated.

As organic materials and metals are quite sensitive to oxygen and water vapor, they need to be packaged and protected after production. PM – OLED is made up from of several layers of organic thin films, but the organic film thickness is only about 1000 ~ 1500 A ° (0.10 ~ 0.15 um), the display board (Panel) in packaging Desiccant (Desiccant) after total thickness of less than 200 um (2 mm), and has the advantages of light.

ملاحظه: معلومات من FPDisplay الأصلي أو شركاء الوسائط