高效濕處理的

1、高效濕處理的第1頁，共19頁，2022年，5月20日，20點35分，星期四Outline概述實驗結(jié)果討論總結(jié)第2頁，共19頁，2022年，5月20日，20點35分，星期四 全色顯示 固體照明光源 液晶顯示的背光源WOLED高的發(fā)光效率；高的顯色指數(shù)；較高的壽命；綠色、面光源、無輻射第3頁，共19頁，2022年，5月20日，20點35分，星期四電子的能量狀態(tài)單重態(tài)S表示所有電子都是自旋配對的（大多數(shù)基態(tài)分子都處于單重態(tài)）三重態(tài) T表示電子在躍遷過程中伴隨著自旋方向的變化（自旋平行）激發(fā)分子從第一激發(fā)單重態(tài)的最低振動能級躍遷到基態(tài)各振動能級時所產(chǎn)生的光子輻射稱為熒光。激發(fā)分子由第一激發(fā)三重態(tài)的最低

2、振動能級躍遷到基態(tài)各振動能級時所產(chǎn)生的光子輻射稱為磷光?；鶓B(tài)單重態(tài)S三重態(tài)TE第4頁，共19頁，2022年，5月20日，20點35分，星期四其中S0、S1和S2分別表示分子的基態(tài)、第一和第二電子激發(fā)的單重態(tài)T1和T2則分別表示分子的第一和第二電子激發(fā)的三重態(tài)。V=0、1、2、3、表示基態(tài)和激發(fā)態(tài)的振動能級。S2S1S0T1吸收發(fā)射熒光發(fā)射磷光系間跨越內(nèi)轉(zhuǎn)換振動弛豫能量l 2l 1l 3 外轉(zhuǎn)換l 2T2內(nèi)轉(zhuǎn)換振動弛豫第5頁，共19頁，2022年，5月20日，20點35分，星期四第6頁，共19頁，2022年，5月20日，20點35分，星期四 The blue-emitting component

3、 used in a WOLED comes through from fluorescent DPVBi(4,40-bis(2,2-diphenylethenyl)biphenyl),Sprio-fluorenes,Super p-conjugating molecules like anthracene and perylene, carbazole or triphenylamine modified molecules, transition metal co-mplexes to phosphorescent fluorine substituted iridium complexe

4、s, e.g. FIrpic,iridium(III) bis(4,6-difluorophenyl)-pyridinato-N,C2picolinate.In all these reports, the blue emitting material is completely different from the green, yellow or red color emitting materials in both chemical structure and physical property.第7頁，共19頁，2022年，5月20日，20點35分，星期四In this paper,

5、 we use the ligand as the blue emitter and the corresponding iridium complex as the yellow emitter to produce white color. reduce the cost of synthesis the energy transfer from ligand to complex is efficient the homogeneity may be improved device efficiency and stability第8頁，共19頁，2022年，5月20日，20點35分，星

6、期四實驗Scheme 1. The ligands were labeled as LH, LCH3, LPh and LF, respectively, the complexes were labeled as IrH, IrCH3, IrPh and IrF, respectivelyCarbazolepara-bromated benzene derivatives2,5-dibromopyridine第9頁，共19頁，2022年，5月20日，20點35分，星期四For the ligands we expect to get deep-blue emission and for th

7、e complexes we expect to red-shift the usually green-emitting phosphorescence.OLED器件結(jié)構(gòu)第10頁，共19頁，2022年，5月20日，20點35分，星期四The devices were measured with a current/voltage source/measure unit (Keithley 2400) and a PR-650 luminance color meter. The color meter was placed on the bottom of the test device t

8、o mea ure the front luminance.玻璃基片分別放入盛有清洗液、去離子水、丙酮以及異丙酮的容器中進行超聲清洗處理。接著, 放在紫外臭氧室10分鐘。high vacuum 10-4mbar第11頁，共19頁，2022年，5月20日，20點35分，星期四結(jié)果討論yellow color electroluminescent devices were fabricated with the structure ITO/PEDOT:PSS(130 nm)/10% IrCH3 or IrPh in CBP(90 nm)/TPBI(45 nm)/LiF/Al.Fig. 1. Cur

9、rent efficiency vs. current density of the electrophosphorent yellow emitting device. Inset: spectra of IrCH3 under different driving voltages.current efficiency 20.6 cd/A, external efficiency 5.52%第12頁，共19頁，2022年，5月20日，20點35分，星期四 parameterType Current efficiency External quantum efficiencyCIE coord

10、inatesIrPh18.62 cd/A 5.14%(0.45, 0.54)IrH17.09 cd/A4.44%(0.41, 0.57) IrF15.87 cd/A 4.21%(0.43, 0.55)IrCH320.6 cd/A5.52%(0.43, 0.56)第13頁，共19頁，2022年，5月20日，20點35分，星期四Fig. 2. Efficient energy transfer from ligand to Ir complex. (a) Phosphorescence intensity of IrPh with addition of differently concentra

11、ted LPh measured at 77 K (liquid N2).Inset of (a) from left to right: photo of the blue emission of LPh, yellow emission of IrPh and white emission of the more concentrated LPh plus IrPh. The concentration of LPh and IrPh were adjusted through control of the absorption at 313 nm in CH2Cl2 at room te

12、mperature to be 0.175, 0.378, 0.624 and 0.469, respe-ctively. Then, take 1 ml IrPh and put it into a quartz tube, take another 1ml CH2Cl2, 1 ml ligand of different concentrations and put them into the quartz tubes with IrPh in it and measure their emission intensities at the same machine run at 77 K

13、 (dilute L, conc. L and more conc. L means their absorption at 313 nm being 0.175, 0.368 and 0.624, respectively).第14頁，共19頁，2022年，5月20日，20點35分，星期四(b) The excitation and emission of the ligands at room temperature. (c) The excitation and emission of the complexes at 77 K. It is evident that the emiss

14、ion of the ligand overlaps well with the excitation of the Ir complex第15頁，共19頁，2022年，5月20日，20點35分，星期四Fig. 3. (a) Normalized WOLED emission based on IrPh under different biases. Device structure: ITO/PEDOT:PSS/CBP:LPh:IrPh = 180:10:1 (molar ratio)/TPBI/LiF/Al. Inset: photo of the white lighting devic

15、e;The phosphorescence emission is much stronger than the fluorescence emission. This is easy to be understood: in Ph-OLED, excitons in both singlet and triplet levels can be harvested and transformed into photons. In addition, the blue fluorescent emission increases faster with the increasing voltage than the yellow phosphorescent emission. This may be caused by the faster transporting of electrons towards the anode than th-at of holes toward the cathode under higher electric field.第16頁，共19頁，2022年，5月20日，20點35分，星期四 (b) luminancecurrent densityvoltage curves; (c)