A3B5 based solar cells and concentrating optical elements for space PV modules

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1、Solar~MaterialsandSolarCellsELSEVIERSolarEnergyMaterialsandSolarCells44(1996)319-332A3B5basedsolarcellsandconcentratingopticalelementsforspacePVmodulesV.M.Andreev*,V.D.RumyantsevloffePhvsico-TechnicalInstitutePolytechnicheskaya26,194021St.Petersburg,RussiaAbstractThispaperpre

2、sentsbrieflytheresultsofthedevelopmentofAIGaAs/GaAs,InP/InGaAsandGaSbcellsmanufacturedfortandemsolarcells,aswellastandemsdesignedforpointandline-focusconcentratormodules.Themaximumefficiency23-23.8%(25°C,AM0)under20-100sunshasbeenreachedintheinfraredtransparentA1GaAs/GaAscell

3、swithprismaticcover.Theefficiency27.5%underAM1.5,140sunsconditionshasbeenreachedaswell.Thebottomcellsarebasedonlattice-matchedInP/InGaAsorGaShhomo-junctionZn-diffusedstructures.Thesummationofthehighestefficienciesmeasuredinthetopandbottomcellsgavethevalues28.8%-29.4%(AM0,20-7

4、0suns,25°C)and33.2%(AM1.5,100suns,30°C).Twotypesofconcentratorphotovoltaicmodulesemployingthereflectiveopticalelementshavebeendeveloped.Thefirsttypeisbasedoncompoundparabolicconcentrators,thesecondoneonline-focusparabolictroughs.Theestimatedspecificparametersofthesemoduleswit

5、hsingle-junctionA1GaAs/GaAssolarcellsarethefollowing:230-240W.m-2(AM0)and3kg"m-2.Theusageoftandemcellswillallowtoincreasespecificpowerofthesemodulesonthevalueof20-25%.Keywords:III-Vsemiconductors;Solarcells;Solarconcentrators1.PrefaceSpacephotovoltaicshasbeenoneofmajorfieldso

6、fsemiconductorphysicsandtechnologysincetheend1950s.Theincreasinguseofphotovoltaicpowersourcesinspacehasledtothedevelopmentofnewcellstructuresandmaterialsaswellasnewopticaldesigns.ThiswayofPVdevelopmentinformerUSSRandRussiahadbeen*Correspondingauthor.Fax:78122471017.0927-0248/

7、96/$15.00Copyright©1996ElsevierScienceB.V.Allrightsreserved.PIIS0927-0248(96)00049-9320V.M.Andreev,V.D.Rumyantsev/SolarEnergyMaterialsandSolarCells44(1996)319-332connectedduringdecadesanduptoMay1995withthenameMarkKoltun,oneofthemostcompetentexpertsinopticsandtestingofsolarcel

8、ls[1,2].ThispaperpresentsonlyoneofthewaystoimprovefuturespacePVsyste