Extending the Compositional Space of Mixed Lead Halide Perovskites by Cs, Rb, K, and Na Doping

QC 20180730
A trend in high performing lead halide perovskite solar cell devices has been increasing compositional complexity by successively introducing more elements, dopants, and additives into the structure; and some of the latest top efficiencies have been achieved with a quadruple cation mixed halide perovskite Cs(x)FA(y)MA(z)Rb(1-x-y-z)PbBr(q)I(3-9). This paper continues this trend by exploring doping of mixed lead halide perovskites, FA(0.83)MA(0.17)PbBr(0.51)I(2.49), with an extended set of alkali cations, i.e., Cs+, Rb+, K+, and Na+, as well as combinations of them. The doped perovskites were investigated with X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, hard X-ray photoelectron spectroscopy, UV-vis, steady state fluorescence, and ultrafast transient absorption spectroscopy. Solar cell devices were made as well. Cs+ can replace the organic cations in the perovskite structure, but Rb+, K+, and Na+ do not appear to do that. Despite this, samples doped with K and Na have substantially longer fluorescence lifetimes, which potentially could be beneficial for device performance.

Svanström, SebastianUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)sebsv792 (författare)
Andrei, VirgilUniv Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England. (författare)
Rivett, Jasmine P. H.Univ Cambridge, Dept Phys, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England. (författare)
Kornienko, NikolayUniv Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England. (författare)
Philippe, Bertrand,Dr.1986-Uppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)phibe331 (författare)
Cappel, Ute B.KTH,Kemi,KTH Royal Inst Technol, Dept Chem, Tekn Ringen 30, S-10044 Stockholm, Sweden(Swepub:kth)u15ztiw5 (författare)
Rensmo, HåkanUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)hakanrm (författare)
Deschler, FelixUniv Cambridge, Dept Phys, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England. (författare)
Boschloo, GerritUppsala universitet,Fysikalisk kemi(Swepub:uu)gerrbosc (författare)
Uppsala universitetFysikalisk kemi (creator_code:org_t)

Ingår i:The Journal of Physical Chemistry C: American Chemical Society (ACS)122:25, s. 13548-135571932-74471932-7455

Av författaren/redakt...: Jacobsson, Jespe ...; Svanström, Sebas ...; Andrei, Virgil; Rivett, Jasmine ...; Kornienko, Nikol ...; Philippe, Bertra ...; visa fler...; Cappel, Ute B.; Rensmo, Håkan; Deschler, Felix; Boschloo, Gerrit; visa färre...

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