This paper reports that highly transparent and low resistance tantalum-doped indium tin oxide （Ta-doped ITO） films contacted to p-type GaN have been prepared by the electron-beam evaporation technique. The Ta-doped ...This paper reports that highly transparent and low resistance tantalum-doped indium tin oxide （Ta-doped ITO） films contacted to p-type GaN have been prepared by the electron-beam evaporation technique. The Ta-doped ITO contacts become Ohmic with a specific contact resistance of $／sim 5.65／times 10^{ - 5}$$／Omega ／cdot$cm$^{2}$ and show the transmittance of $／sim $98% at a wavelength of 440nm when annealed at 500／du. Blue light emitting diodes （LEDs） fabricated with Ta-doped ITO p-type Ohmic contact layers give a forward-bias voltage of 3.21V at an injection current of 20mA. It further shows that the output power of LEDs with Ta-doped ITO contacts is enhanced 62% at 20mA in comparison with that of LEDs with conventional Ni/Au contacts展开更多
It is certain that a good application letter can help a job seeker win more interview chances than others. Therefore, it isnecessary for a job seeker to write a tact application letter, among which the language using ...It is certain that a good application letter can help a job seeker win more interview chances than others. Therefore, it isnecessary for a job seeker to write a tact application letter, among which the language using is a very important aspect. This paperwill analyze the language characteristics in English application letters from the angle of tact maxim in politeness principle. Tactmaxim asks job seekers to write an application letter with correct format and decent language. So the purpose is to help more peoplewrite qualified application letters with the guidance of tact maxim.展开更多
基金Project supported by Science and Technology Planning Project of Guangdong Province (Grant No. 2007A010501008)the Production and Research Project of Guangdong Province and the Ministry of Education (Grant No. 2009B090300338)
文摘This paper reports that highly transparent and low resistance tantalum-doped indium tin oxide （Ta-doped ITO） films contacted to p-type GaN have been prepared by the electron-beam evaporation technique. The Ta-doped ITO contacts become Ohmic with a specific contact resistance of $／sim 5.65／times 10^{ - 5}$$／Omega ／cdot$cm$^{2}$ and show the transmittance of $／sim $98% at a wavelength of 440nm when annealed at 500／du. Blue light emitting diodes （LEDs） fabricated with Ta-doped ITO p-type Ohmic contact layers give a forward-bias voltage of 3.21V at an injection current of 20mA. It further shows that the output power of LEDs with Ta-doped ITO contacts is enhanced 62% at 20mA in comparison with that of LEDs with conventional Ni/Au contacts
文摘G.N.Leech(1983)针对H.P.Gricc的合作原则而提出了礼貌原则(Politeness Principle),对于其中最重要的一条准则--Tact Maxim,何自然等译成"得体准则".刘润清等译成"策略准则",当笔者有幸阅读Leech原著"Principles of Pragmatics"(<语用学原则>)时,发现这两种译文都同原文似有出入.
文摘It is certain that a good application letter can help a job seeker win more interview chances than others. Therefore, it isnecessary for a job seeker to write a tact application letter, among which the language using is a very important aspect. This paperwill analyze the language characteristics in English application letters from the angle of tact maxim in politeness principle. Tactmaxim asks job seekers to write an application letter with correct format and decent language. So the purpose is to help more peoplewrite qualified application letters with the guidance of tact maxim.
