000172731 001__ 172731
000172731 005__ 20240708133630.0
000172731 037__ $$aFZJ-2014-06175
000172731 1001_ $$0P:(DE-Juel1)145479$$aHoffmann, Andre$$b0$$eCorresponding Author$$ufzj
000172731 1112_ $$a40th IEEE Photovoltaic Specialist Conference$$cDenver, CO$$d2014-06-08 - 2014-06-13$$wUSA
000172731 245__ $$aCoupling Incident Light to Guided Modes in Thin-Film Tandem Solar Cells with Intermediate Reflector
000172731 260__ $$c2014
000172731 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1416573127_31054$$xInvited
000172731 3367_ $$033$$2EndNote$$aConference Paper
000172731 3367_ $$2DataCite$$aOther
000172731 3367_ $$2ORCID$$aLECTURE_SPEECH
000172731 3367_ $$2DRIVER$$aconferenceObject
000172731 3367_ $$2BibTeX$$aINPROCEEDINGS
000172731 520__ $$aIn thin-film silicon tandem solar cells, hydrogenated amorphous (a-Si:H) and microcrystalline (µc-Si:H) silicon solar cells are connected in series. Due to inherent material properties, the thickness of the a-Si:H top cell has to be small. Different light management concepts are applied to increase the top cell photocurrent generation. Typically, textured interfaces as well as intermediate reflectors (IRs) between top and bottom cell are incorporated into the device structure. The design and optimization of the device structure with IR on textured substrates is often done by rigorous optical simulations assuming large calculation domains.We will show in our contribution that such optical simulations provide much more information about the physical mechanism of light trapping inside the tandem solar cells. In particular, we investigate the light coupling to guided optical modes in the a-Si:H top cell by the interplay between the textured interfaces and the chosen type of IR. This study is done by Fourier analysis of the local light intensity distribution inside the absorber layers. This analysis provides information about light intensity as a function of planar wave vector. Guided modes are characterized by their large planar wave vector which forbids light propagation in air.The amount of light intensity in guided modes inside the a-Si:H absorber layer is correlated to the experimentally determined external quantum efficiency in the top cell for different types of IR and different front side textures. Those results show the importance of an efficient light coupling to guided modes in order to achieve high efficiency thin-film solar cells.
000172731 536__ $$0G:(DE-HGF)POF2-111$$a111 - Thin Film Photovoltaics (POF2-111)$$cPOF2-111$$fPOF II$$x0
000172731 536__ $$0G:(DE-Juel1)HITEC-20170406$$aHITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)$$cHITEC-20170406$$x1
000172731 7001_ $$0P:(DE-Juel1)130219$$aBittkau, Karsten$$b1$$ufzj
000172731 7001_ $$0P:(DE-Juel1)136680$$aZhang, Chao$$b2$$ufzj
000172731 7001_ $$0P:(DE-Juel1)130268$$aMerdzhanova, Tsvetelina$$b3$$ufzj
000172731 7001_ $$0P:(DE-Juel1)130285$$aRau, Uwe$$b4$$ufzj
000172731 773__ $$y2014
000172731 909CO $$ooai:juser.fz-juelich.de:172731$$pVDB
000172731 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)145479$$aForschungszentrum Jülich GmbH$$b0$$kFZJ
000172731 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130219$$aForschungszentrum Jülich GmbH$$b1$$kFZJ
000172731 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)136680$$aForschungszentrum Jülich GmbH$$b2$$kFZJ
000172731 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130268$$aForschungszentrum Jülich GmbH$$b3$$kFZJ
000172731 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130285$$aForschungszentrum Jülich GmbH$$b4$$kFZJ
000172731 9132_ $$0G:(DE-HGF)POF3-121$$1G:(DE-HGF)POF3-120$$2G:(DE-HGF)POF3-100$$aDE-HGF$$bPOF III$$lForschungsbereich Energie$$vErneuerbare Energien$$x0
000172731 9131_ $$0G:(DE-HGF)POF2-111$$1G:(DE-HGF)POF2-110$$2G:(DE-HGF)POF2-100$$3G:(DE-HGF)POF2$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lErneuerbare Energien$$vThin Film Photovoltaics$$x0
000172731 9141_ $$y2014
000172731 920__ $$lyes
000172731 9201_ $$0I:(DE-Juel1)IEK-5-20101013$$kIEK-5$$lPhotovoltaik$$x0
000172731 980__ $$aconf
000172731 980__ $$aVDB
000172731 980__ $$aI:(DE-Juel1)IEK-5-20101013
000172731 980__ $$aUNRESTRICTED
000172731 981__ $$aI:(DE-Juel1)IMD-3-20101013