河南大学微电子学与同体电子学专业2007级硕士学位论文
3.ZnO/NiO
glasssubstratesheterojunctionbyisfabricatedbeamonfluorine-dopedtilloxideconductingtechnique.Thelaser-molecularepitaxysamplesarecharacterizedbyX—raydiffraction,rectificationcharacteristic,UV-visibleabsorptionspectroscopyandsurfacephotovoltagespectroscopy.The
aall-oxideheterojunctionshowsclearrectificationcharacteristicwith
photovoltaicresponseat373n/nthresholdvoltageofabout1.5VTheneworiginatingfromZnOisenhancedgreatly
nlTlandawidephotovoltagebandfrom390to600
showthisisbroughtbyZnO/NiOheterojunction.andotherTheresultsheterojunctionhaspotentialapplicationinphotocells
optoelectronicdevices.
4.ZnOthinfilms
ZnOthinfilmsareand(Bu4N)2(Ru)(dcbpyH)2(NCS)2.(calledonN719)sensitizedgrownfluorine—dopedtiIloxideconductingglasssubstratesusinglasermolecularbeamepitaxy.Ultraviolet-visibleabsorption,photolumineseence,surfacephotovoltagespectroscopy,andRamanscatteringareemployedtoprobeintothetransitionprocessofphotogeneratedchargesandthe
ainteractionbetweenZnOandN719.Theexperimentalresultsindicatethatthereisstronginteraction
greatlybetweenN719enhancestheandZnOthroughchemiadsorption.The
thustheinteractionphotogeneratedchargeseparationandphotovoltaicresponseoftheZnOfilm
butremarkedlyweakensitsradiativerecombination,i.e.photoluminescence,implyingstrongenergy
weakandchargetransferoccuringbetweenN719ataboutandZnO.Inaddition,anewIlrIlphotoluminescencepeakobserved720isattributedtotheelectron.holerecombinationofN719.
Keywords:ZnO/NiOheterojunction;N719/ZnOheterostructure;L—MBEtechnique;
surfacephotovoltagespectroscopy