000877889 001__ 877889 000877889 005__ 20240712084532.0 000877889 0247_ $$2doi$$a10.1103/PhysRevResearch.2.023109 000877889 0247_ $$2Handle$$a2128/25292 000877889 0247_ $$2altmetric$$aaltmetric:80984674 000877889 0247_ $$2WOS$$aWOS:000602780200009 000877889 037__ $$aFZJ-2020-02494 000877889 082__ $$a530 000877889 1001_ $$0P:(DE-Juel1)166075$$aKaienburg, Pascal$$b0$$eCorresponding author 000877889 245__ $$aHow solar cell efficiency is governed by the αμτ product 000877889 260__ $$aCollege Park, MD$$bAPS$$c2020 000877889 3367_ $$2DRIVER$$aarticle 000877889 3367_ $$2DataCite$$aOutput Types/Journal article 000877889 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1594903529_23652 000877889 3367_ $$2BibTeX$$aARTICLE 000877889 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000877889 3367_ $$00$$2EndNote$$aJournal Article 000877889 520__ $$aThe interplay of light absorption, charge-carrier transport, and charge-carrier recombination determines the performance of a photovoltaic absorber material. Here we analyze the influence on the solar-cell efficiency of the absorber material properties absorption coefficient α, charge-carrier mobility μ, and charge-carrier lifetime τ, for different scenarios. We combine analytical calculations with numerical drift-diffusion simulations to understand the relative importance of these three quantities. Whenever charge collection is a limiting factor, the αμτ product is a good figure of merit (FOM) to predict solar-cell efficiency, while for sufficiently high mobilities, the relevant FOM is reduced to the ατ product. We find no fundamental difference between simulations based on monomolecular or bimolecular recombination, but strong surface-recombination affects the maximum efficiency in the high-mobility limit. In the limiting case of high μ and high surface-recombination velocity S, the α/S ratio is the relevant FOM. Subsequently, we apply our findings to organic solar cells which tend to suffer from inefficient charge-carrier collection and whose absorptivity is influenced by interference effects. We estimate that a modest increase in absorption strength by a factor of 1.5 leads to a relative efficiency increase of more than 10% for state-of-the-art organic solar cells. 000877889 536__ $$0G:(DE-HGF)POF3-121$$a121 - Solar cells of the next generation (POF3-121)$$cPOF3-121$$fPOF III$$x0 000877889 588__ $$aDataset connected to CrossRef 000877889 7001_ $$0P:(DE-Juel1)173073$$aKrückemeier, Lisa$$b1 000877889 7001_ $$0P:(DE-Juel1)176482$$aLübke, Dana$$b2 000877889 7001_ $$00000-0003-1048-1330$$aNelson, Jenny$$b3 000877889 7001_ $$0P:(DE-Juel1)130285$$aRau, Uwe$$b4 000877889 7001_ $$0P:(DE-Juel1)159457$$aKirchartz, Thomas$$b5 000877889 773__ $$0PERI:(DE-600)3004165-X$$a10.1103/PhysRevResearch.2.023109$$gVol. 2, no. 2, p. 023109$$n2$$p023109$$tPhysical review research$$v2$$x2643-1564$$y2020 000877889 8564_ $$uhttps://juser.fz-juelich.de/record/877889/files/PhysRevResearch.2.023109.pdf$$yOpenAccess 000877889 8564_ $$uhttps://juser.fz-juelich.de/record/877889/files/PhysRevResearch.2.023109.pdf?subformat=pdfa$$xpdfa$$yOpenAccess 000877889 909CO $$ooai:juser.fz-juelich.de:877889$$pdnbdelivery$$pdriver$$pVDB$$popen_access$$popenaire 000877889 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)173073$$aForschungszentrum Jülich$$b1$$kFZJ 000877889 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176482$$aForschungszentrum Jülich$$b2$$kFZJ 000877889 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130285$$aForschungszentrum Jülich$$b4$$kFZJ 000877889 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)159457$$aForschungszentrum Jülich$$b5$$kFZJ 000877889 9131_ $$0G:(DE-HGF)POF3-121$$1G:(DE-HGF)POF3-120$$2G:(DE-HGF)POF3-100$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lErneuerbare Energien$$vSolar cells of the next generation$$x0 000877889 9141_ $$y2020 000877889 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess 000877889 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0 000877889 920__ $$lyes 000877889 9201_ $$0I:(DE-Juel1)IEK-5-20101013$$kIEK-5$$lPhotovoltaik$$x0 000877889 9801_ $$aFullTexts 000877889 980__ $$ajournal 000877889 980__ $$aVDB 000877889 980__ $$aUNRESTRICTED 000877889 980__ $$aI:(DE-Juel1)IEK-5-20101013 000877889 981__ $$aI:(DE-Juel1)IMD-3-20101013