An organic electroluminescent (EL) device has been constructed with a double quantum-well structure consisting of N, N'-bis-(1-naphthl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) doped with 5,6,11,...An organic electroluminescent (EL) device has been constructed with a double quantum-well structure consisting of N, N'-bis-(1-naphthl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) doped with 5,6,11,12-tetraphenylnaphthacene (rubrene) as a potential well and emitter, and undoped NPB as a barrier potential. The maximum ELefficiency and brightness reach 5.6cd/A and 40000cd/m^(2), respectively. Most importantly, with the increase of the drive voltage, the EL efficiency (cd/A) declines very slowly after reaching its maximum, almost independent of the drive voltage in a wide range from 5 to 13 V. This characteristic may be useful in the improvement of the lifetime of the device.展开更多
The colloid of delaminated layered double hydroxides(LDHs), a new LDH-based catalyst, is described. The semi-heterogeneous delaminated colloidal MgPdA1-LDH, in which the total surface of catalytic site-bearing lamella...The colloid of delaminated layered double hydroxides(LDHs), a new LDH-based catalyst, is described. The semi-heterogeneous delaminated colloidal MgPdA1-LDH, in which the total surface of catalytic site-bearing lamellae was rendered accessible for chemical reactivity, showed excellent catalysis toward Suzuki reaction. The turnover frequency of this catalyst for Suzuki reaction between bromobenzene and phenylboronic acid is about 8000 h^-1.展开更多
A 33×33 thermo-optically tunable arrayed-waveguide-grating (AWG) has been fabricated by using the poly (2,3,4,5,6-pentafluorostyrene-co-glycidylmethacrylate) (PFS-co-GMA).The technological process of the fabricat...A 33×33 thermo-optically tunable arrayed-waveguide-grating (AWG) has been fabricated by using the poly (2,3,4,5,6-pentafluorostyrene-co-glycidylmethacrylate) (PFS-co-GMA).The technological process of the fabrication of the device is described,and the measured results are presented.The measured spacing of the wavelength channel is about 0.81 nm,the 3-dB bandwidth is about 0.35 nm,the crosstalk is about -20 dB,and the insertion loss is between 10.4 dB for the centre port and 11.9 dB for the edge port.The measured thermo-optical tunable shift is about -0.12 nm/K.The measured center wavelength is 1 545.21-1 551.81 nm in the temperature range from 10℃ to 65℃,and the tuning range is 6.6 nm.展开更多
We present an alternative scheme to exactly implement one-qubit and two-qubit quantum gates with a single trapped cold ion driven by a travelling laser field. The internal degree of freedom of the ion acts as the targ...We present an alternative scheme to exactly implement one-qubit and two-qubit quantum gates with a single trapped cold ion driven by a travelling laser field. The internal degree of freedom of the ion acts as the target qubit and the control qubit is encoded by two Fock states of the external vibration of the ion. The conditions to realize these operations, including the duration of each applied laser pulse and Lamb-Dicke parameter, are derived. In our scheme neither the auxiliary atomic level nor the Lamb-Dicke approximation is required. The multiquantum transition between the internal and external degrees of freedom of the ion is considered.展开更多
Reading Nabokov's Pale Fire is a magical discovery of artistry. Years elapsed, the"who invented whom"question remains an enigma. Through expounding four current interpretations and tracing the relationsh...Reading Nabokov's Pale Fire is a magical discovery of artistry. Years elapsed, the"who invented whom"question remains an enigma. Through expounding four current interpretations and tracing the relationship among the major characters, the real author behind this intriguing work—Nabokov is reshaped. Meanwhile, several fundamental ideas prevalent in his literary creation are discussed, casting some light on the philosophy behind his literary creation.展开更多
In an effort to find out how Nabokov manages to achieve aesthetic immortality in Speak Memory,a detailed text analysis is conducted on the techniques he has utilized.Afterwards,it draws the conclusion that Nabokov,fir...In an effort to find out how Nabokov manages to achieve aesthetic immortality in Speak Memory,a detailed text analysis is conducted on the techniques he has utilized.Afterwards,it draws the conclusion that Nabokov,firmly grounded on his own con⁃sciousness,manages to command memory with the help of imagination,thus,transforming this recreation of memory into a work of aesthetic eternity.展开更多
We have designed a new structure blue emission device with doped Alq_3 of 3% in hole transmission layers of NPB. The CIE coordination of the devices is (0.17,0.19). The maximum electroluminescence efficiency is 4.1 cd...We have designed a new structure blue emission device with doped Alq_3 of 3% in hole transmission layers of NPB. The CIE coordination of the devices is (0.17,0.19). The maximum electroluminescence efficiency is 4.1 cd/A at 11V, the brightness is 118.8 cd/m^2 at 7 V, and the maximum brightness is 10770 cd/m^2 at 13V.展开更多
We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-t...We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-transporting layer.The film morphology of the spin-coated mixture of QDs is strongly improved via thermal annealing,and therefore a close-packed QD-EML is realized between organic charge-transporting layers.As a result,compared to the device with an unannealed QD-EML,the emission of Alq3 is deeply suppressed.In addition,a maximum luminance of more than 1000 cd/m2 and a maximum luminous efficiency of 2.2 cd/A are achieved.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.59973007 and 60077014。
文摘An organic electroluminescent (EL) device has been constructed with a double quantum-well structure consisting of N, N'-bis-(1-naphthl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) doped with 5,6,11,12-tetraphenylnaphthacene (rubrene) as a potential well and emitter, and undoped NPB as a barrier potential. The maximum ELefficiency and brightness reach 5.6cd/A and 40000cd/m^(2), respectively. Most importantly, with the increase of the drive voltage, the EL efficiency (cd/A) declines very slowly after reaching its maximum, almost independent of the drive voltage in a wide range from 5 to 13 V. This characteristic may be useful in the improvement of the lifetime of the device.
基金Supported by the National Natural Science Foundation of China(No.20476092)the Science Foundation of Taizhou University, China(No.09ZD12)
文摘The colloid of delaminated layered double hydroxides(LDHs), a new LDH-based catalyst, is described. The semi-heterogeneous delaminated colloidal MgPdA1-LDH, in which the total surface of catalytic site-bearing lamellae was rendered accessible for chemical reactivity, showed excellent catalysis toward Suzuki reaction. The turnover frequency of this catalyst for Suzuki reaction between bromobenzene and phenylboronic acid is about 8000 h^-1.
文摘A 33×33 thermo-optically tunable arrayed-waveguide-grating (AWG) has been fabricated by using the poly (2,3,4,5,6-pentafluorostyrene-co-glycidylmethacrylate) (PFS-co-GMA).The technological process of the fabrication of the device is described,and the measured results are presented.The measured spacing of the wavelength channel is about 0.81 nm,the 3-dB bandwidth is about 0.35 nm,the crosstalk is about -20 dB,and the insertion loss is between 10.4 dB for the centre port and 11.9 dB for the edge port.The measured thermo-optical tunable shift is about -0.12 nm/K.The measured center wavelength is 1 545.21-1 551.81 nm in the temperature range from 10℃ to 65℃,and the tuning range is 6.6 nm.
基金Supported by the National Natural Science Foundation of China under Grant No.60076011,the Special Funds for Major State Basic Research Project under Grant No.2000683the Ministry of Science and Technology of China,the Shanghai Municipal Commission of Science and Technologythe Shanghai Foundation for Research and Development for Applied Materials。
文摘We present an alternative scheme to exactly implement one-qubit and two-qubit quantum gates with a single trapped cold ion driven by a travelling laser field. The internal degree of freedom of the ion acts as the target qubit and the control qubit is encoded by two Fock states of the external vibration of the ion. The conditions to realize these operations, including the duration of each applied laser pulse and Lamb-Dicke parameter, are derived. In our scheme neither the auxiliary atomic level nor the Lamb-Dicke approximation is required. The multiquantum transition between the internal and external degrees of freedom of the ion is considered.
文摘Reading Nabokov's Pale Fire is a magical discovery of artistry. Years elapsed, the"who invented whom"question remains an enigma. Through expounding four current interpretations and tracing the relationship among the major characters, the real author behind this intriguing work—Nabokov is reshaped. Meanwhile, several fundamental ideas prevalent in his literary creation are discussed, casting some light on the philosophy behind his literary creation.
文摘In an effort to find out how Nabokov manages to achieve aesthetic immortality in Speak Memory,a detailed text analysis is conducted on the techniques he has utilized.Afterwards,it draws the conclusion that Nabokov,firmly grounded on his own con⁃sciousness,manages to command memory with the help of imagination,thus,transforming this recreation of memory into a work of aesthetic eternity.
基金Supported by the National Natural Science Foundation of China(Grant No 60207003 and No.60376028)the Special Funds forMajor State Basic Research Project of China under Grant No2003BC314703.
文摘We have designed a new structure blue emission device with doped Alq_3 of 3% in hole transmission layers of NPB. The CIE coordination of the devices is (0.17,0.19). The maximum electroluminescence efficiency is 4.1 cd/A at 11V, the brightness is 118.8 cd/m^2 at 7 V, and the maximum brightness is 10770 cd/m^2 at 13V.
基金Supported by the National Basic Research Program of China under Grant No 2010CB327701the National Natural Science Foundation of China under Grant Nos 60977024 and 60907021.
文摘We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-transporting layer.The film morphology of the spin-coated mixture of QDs is strongly improved via thermal annealing,and therefore a close-packed QD-EML is realized between organic charge-transporting layers.As a result,compared to the device with an unannealed QD-EML,the emission of Alq3 is deeply suppressed.In addition,a maximum luminance of more than 1000 cd/m2 and a maximum luminous efficiency of 2.2 cd/A are achieved.
