light from the light emitting diode

... refractive indices. When the electron and holes are injected through the electrodes, they combine in the emission layers emitting the photons. These photons will experience the reflection and transmission ... interface and the interference will determine the intensity profile. The light reflected at the interfaces or the metallic electrode returns to the emission layer and affects the radiation ... the frequency response of the micro-cavity The detector apart from the dipole source collects the wave emitted... observed in the experiment and the amount of shift in the simulation complies

Ngày tải lên: 19/06/2014, 21:20

... shown in Fig 2 The each organic layers are called as the hole injection layer (HIL), the HTL, the EML, the HBL, and the HTL The names of these organic layers indicate their functions of the operation ... say the response speed of OLEDs is limited by the time from the applying voltage to the generation of light caused by the carrier recombination We examined the details of these processes and the ... electrons transport into the HTL and the ETL, respectively Finally, the carriers recombine into the EML, resulting in the generation of light The generated light comes out from a transparent anode

Ngày tải lên: 19/06/2014, 21:20

... around 549 nm, which confirms the yellowish-green emission originating from the triplet excited states of the Ir(misppy)3 dopant in the EML of the device No emission from host and/or adjacent layers ... based on Ir(ppy)3 shows the green EL emission peak at 512 nm with shoulder peak around 539 nm originating from the triplet excited states of the Ir(ppy)3 dopant in the EML of the device, which is ... role in the enhancement of the spin-orbit coupling The PL specta of Ir(disppy)3 complex show the phosphorescence emission at 519 nm in solution and 513 nm in the film Interestingly, the emission

Ngày tải lên: 20/06/2014, 11:20

... nanoparticles in the polymer due to the spin-coating process For the pure polymeric PEDOT, the surface exhibits smoothness comparable to the one of the area surrounding the nanoparticles The TiO2 nanoparticles ... nanoparticles in the polymer due to the spin-coating process For the pure polymeric PEDOT, the surface exhibits smoothness comparable to the one of the area surrounding the nanoparticles The TiO2 nanoparticles ... achieved if the excitons would travel far enough from their generation points to appropriate interfaces where they can dissociate, injecting electrons into the electrode The holes remaining in the polymer

Ngày tải lên: 20/06/2014, 11:20

... and the capacitance decreases The negative slope is related to the recombination efficiency The lower the capacitance, the better the recombination efficiency The slower decreasing trend of the ... and the capacitance decreases The negative slope is related to the recombination efficiency The lower the capacitance, the better the recombination efficiency The slower decreasing trend of the ... reduce the contribution of the time to charge the device, attention was paid to the RC time constant of the EL cells The maximum measured capacitance, C, of the EL cells was about 6 nF The series

Ngày tải lên: 20/06/2014, 11:20

... darkening the electrode on the non-emitting side of the OLED, neglecting the reflections on emitting side of the OLED and the contribution of the electrodes’ reflectance to the efficiency of the OLED ... that of the light emitted by the pixel, thus contributing to reduce the ambient light reflection (Urabe et al., 2004) When combined, these RGB pigments can darken the surfaces surrounding the pixels ... increase the asymmetry, but is not essential In the case of the anode (as in many other cases involving asymmetric reflectance), a reduction of the light absorption in the layer is important The

Ngày tải lên: 20/06/2014, 11:20

... value The contrast ratio, which means the ratio of the white and black level, is low because of a leakage light at the black level On the other hand, the IOLED of the CCTOLED independent of the ... value The contrast ratio, which means the ratio of the white and black level, is low because of a leakage light at the black level On the other hand, the IOLED of the CCTOLED independent of the ... but are polluting Therefore there is a need for energy efficient and clean light source and solid state lighting is one of the ways to address the problem Organic light emitting diodes (OLED) is

Ngày tải lên: 20/06/2014, 11:20

... component for the white emission has been obtained from the singlet state of the host material Zn(hpb)2 and red component from the triplet energy transfer from the triplet state of the host to the triplet ... component for the white emission has been obtained from the singlet state of the host material Zn(hpb)2 and red component from the triplet energy transfer from the triplet state of the host to the triplet ... fabricate white light emitting diodes Varying dopant concentrations controls the color of the device (Fig 12) The maximum luminance of the device is 4450 cd/m2 The CIE coordinates of the device are

Ngày tải lên: 20/06/2014, 11:20

... (Light-Emitting Diode: Diode phát quang) hay LCD (Liquid Crystal Display: Màn hình tinh thể lỏng) hiện tại sử dụng đèn nền trong khi OLED không cần Thành phần chính của OLED: Giống như một diode ... Vật Lý Ứng Dụng Môn Học: CÁC PHƯƠNG PHÁP THỰC NGHIỆM Đề Tài Báo Cáo: OLED (Organic Light-Emitting Diode ) (Diode Phát Quang Hữu Cơ) GVHD: TS LÊ TRẤN HV: PHẠM ĐĂNG KHOA Trang 2Khái Niệm OLED:Các ... nền trong khi OLED không cần Thành phần chính của OLED: Giống như một diode phát quang LED, một diode phát quang hữu cơ OLED là một thiết bị bán dẫn thể rắn có độ dày từ 100 đến 500 nanomet hay

Ngày tải lên: 23/05/2015, 10:34

... tế. 5 Ưu và nhược điểm của OLED. Trang 21 TỔNG QUAN VỀ CÔNG NGHỆ OLED ◦ Organic Light-Emitting Diode: Diode phát quang hữu cơ. ◦ Là thiết bị thể rắn,cấu tạo từ nhiều lớp màng ... Trang 1GIỚI THIỆU VỀ OLED(Organic Light – Emitting Diode)  Nội dung chính: 1 Tổng quang về công nghệ OLED. 2 Thành phần cấu tạo ... 5 ƯU & NHƯỢC ĐIỂM CỦA OLED Trang 28XIN CHÂN THÀNH CÁM ƠN THẦY VÀ CÁC BẠN ĐÃ THEO DÕI THE END

Ngày tải lên: 23/05/2015, 10:57

... attention The operating principles of organic light-emitting diodes (OLEDs) are fundamentally distinct from conventional inorganic semiconductor-based light-emitting diodes (LEDs) The rectification ... Apart from the morphological instability of these polycrystalline films, there arises the problem of fabricating pin-hole-free thin films from these materials These problems could be overcome in the ... sequence from the anode to the cathode, as shown in Figure 1.1 The virtues of the multilayer device are the balanced transport of electrons and holes and the confinement of the emission region away from

Ngày tải lên: 14/09/2015, 08:24

... The EL spectra reveal the same blue shift in the green emission as observed from the PL spectra The irradiation has a minor effect on the color-rendering properties of the LEDs It decreases the ... coated on the ZnO NRs to fill the gaps between the NRs to isolate electrical contacts on the ZnO NRs from reaching the p-type substrate and helps to prevent the carrier cross talk among the nanorods ... powder (99.9%) is used as the source material The pure zinc powder was placed in a quartz tube and the substrates are placed on the boat at the downstream side of the gas flow The substrates are placed...

Ngày tải lên: 18/06/2014, 22:20

... by the bipolar property of the CCLs Background Due to their high efficiency, phosphorescent organic light- emitting diodes [PHOLEDs] are promising light- emitting materials in organic light- emitting ... organic light- emitting diodes [PHOLEDs] Four types of devices from one to four quantum wells are fabricated following the number of CCLs which are mixed p- and n-type materials, maintaining the thickness ... improved for lighting applications Light emission in PHOLEDs depends on the properties of the organic material in the devices [3, 4] In particular, the energy level of the charge transport, host, and...

Ngày tải lên: 20/06/2014, 23:20

... Application Note The infrared light emitted from the LED of the photointerrupter is dispersed by particles of smoke The dispersion of light is s ensed by the light detector of the photointerrupter ... the LED in the linear region of the light- emitting characteristics In the arrangement of Figure 10, a fixed bias (IF1) is applied to the LED using R1 and R2 so that the maximum amplitude of the ... Circuits VCC When the switch is in the ON-state, the SCR2 and SCR3 turn on to discharge capacitor C4 so that the xenon lamp is energized to emit light The anode of the SCR2 is then reverse-biased,...

Ngày tải lên: 23/12/2013, 00:16

... on the server running the adapter Suite\CustomRFC.zip” 1-(2) Copy the transport file with the naming pattern K9*.BI1 from the installation directory on the computer running the adapters to the ... SAP server) Extract from help(SAPAdapter.chm) “Installing the Custom RFCs for SAP ADO Provider” To install the RFCs 1-(1) Copy files from the computer running the adapters to the SAP application ... directory on the SAP application server: :\usr\sap\trans\cofiles 1-(3) Copy the transport file with the naming pattern R9*.BI1 from the installation directory on the computer running the adapters...

Ngày tải lên: 19/03/2014, 22:17

... organic light- emitting diodes with blue -emitting Alq Photopolym Sci Technol 2004, 17:2 Reineke S, Lindner F, Schwartz G, Seidler N, Walzer K, Lüssem B, Leo K: White organic light- emitting diodes ... of organic light- emitting diodes Acta Phys Sin 2010, 59:8093 23 Jian Z, Juan G, Zhuo G, Ke D, Jiule C: An organic light- emitting device with ultrathin quantum-well structure as light emitting layer ... between the central and surrounding emitting layers The effect of layer thickness and combination of different emissive layers on charge carrier transport mechanism from the quantum well-like and the...

Ngày tải lên: 06/05/2014, 08:55

... that the iridium unit in 10 and 12 has the similar structure to 14 The appearance of the signal at  8.7 in the spectra for the products indicated that the free pyridyl group at the end of the ... mainly from the host polymer 16 in device F The behavior was different from the devices T and U, in which the luminescence from the doped platinum complex (605 and 650 nm) into 16 was detected These ... in the solutions were comparable For example, red luminescence from was observed and the wavelength at the maximum intensity was 620 nm The PL spectra for showed the emissions at ~620 nm from the...

Ngày tải lên: 19/06/2014, 21:20

... occur in the UV region Furthermore, molecular systems that are light emitters in the visible region are potentially useful in the fabrication of organic light emitting diodes (OLEDs) Therefore, ... Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes 27 interaction in the solid state The ... pyrene-cored light- emitting monomers (10-20) Although the IR spectra of 15 in the B- and G-form were essentially the same, and the lowershifted peak of the amide NH stretching at 3282 cm-1 indicated the...

Ngày tải lên: 19/06/2014, 21:20

... 64 Organic Light Emitting Diode – Material, Process and Devices injection from the electrodes in the OLED devices or through the dissociation of EHPs created by the incident light in the solar ... further confirming the above results that the incorporation of trimethylsilyl groups into the polymeric backbone decreases the interactions between the pyrene units On the other hand, the band around ... at the 1,3-positions in the monomer synthesis, and also for both attaining sufficient solubility and avoiding the use of long alkyl chains The UV-vis absorption and 50 Organic Light Emitting Diode...

Ngày tải lên: 19/06/2014, 21:20