000232248 001__ 232248
000232248 005__ 20181203024846.0
000232248 0247_ $$2doi$$a10.1002/adma.201702005
000232248 022__ $$a0935-9648
000232248 02470 $$2ISI$$a000412452500009
000232248 037__ $$aARTICLE
000232248 245__ $$aGlobularity-Selected Large Molecules for a New Generation of Multication Perovskites
000232248 260__ $$aWeinheim$$bWiley-Blackwell$$c2017
000232248 269__ $$a2017
000232248 300__ $$a9
000232248 336__ $$aJournal Articles
000232248 520__ $$aPerovskite solar cells (PSCs) use perovskites with an APbX(3) structure, where A is a monovalent cation and X is a halide such as Cl, Br, and/or I. Currently, the cations for high-efficiency PSCs are Rb, Cs, methylammonium (MA), and/or formamidinium (FA). Molecules larger than FA, such as ethylammonium (EA), guanidinium (GA), and imidazolium (IA), are usually incompatible with photoactive black-phase perovskites. Here, novel molecular descriptors for larger molecular cations are introduced using a globularity factor, i.e., the discrepancy of the molecular shape and an ideal sphere. These cationic radii differ significantly from previous reports, showing that especially ethylammonium (EA) is only slightly larger than FA. This makes EA a suitable candidate for multication 3D perovskites that have potential for unexpected and beneficial properties (suppressing halide segregation, stability). This approach is tested experimentally showing that surprisingly large quantities of EA get incorporated, in contrast to most previous reports where only small quantities of larger molecular cations can be tolerated as additives. MA/EA perovskites are characterized experimentally with a band gap ranging from 1.59 to 2.78 eV, demonstrating some of the most blue-shifted PSCs reported to date. Furthermore, one of the compositions, MA(0.5)EA(0.5)PbBr(3), shows an open circuit voltage of 1.58 V, which is the highest to date with a conventional PSC architecture.
000232248 6531_ $$alight-emitting devices
000232248 6531_ $$aperovskite solar cells
000232248 6531_ $$aquasi-3D cations
000232248 6531_ $$awide band-gap semiconductors
000232248 700__ $$aGholipour, Somayeh$$uEcole Polytech Fed Lausanne, Lab Photomol Sci, Stn 6, CH-1015 Lausanne, Switzerland
000232248 700__ $$aAli, Abdollah Morteza$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232248 700__ $$aCorrea-Baena, Juan-Pablo$$uEcole Polytech Fed Lausanne, Lab Photomol Sci, Stn 6, CH-1015 Lausanne, Switzerland
000232248 700__ $$aTurren-Cruz, Silver-Hamill$$uBenemerita Univ Autonoma Puebla, CIDS, Av San Claudio & 18 Sur,Ciudad Univ,CP 72570, Puebla 7200, Pue, Mexico
000232248 700__ $$aTajabadi, Fariba$$uMat & Energy Res Ctr, Dept Nanotechnol & Adv Mat, Karaj 31787316, Iran
000232248 700__ $$0247910$$aTress, Wolfgang$$g243563$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232248 700__ $$aTaghavinia, Nima$$uSharif Univ Technol, Dept Phys, Tehran 14588, Iran
000232248 700__ $$0240191$$aGraetzel, Michael$$g105292$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232248 700__ $$0248276$$aAbate, Antonio$$g251292$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232248 700__ $$aDe Angelis, Filippo$$uCNR, Computat Lab Hybrid Organ Photovolta CLHYO, ISTM, Via Elce Sotto 8, I-06123 Perugia, Italy
000232248 700__ $$aGaggioli, Carlo Alberto$$uCNR, Computat Lab Hybrid Organ Photovolta CLHYO, ISTM, Via Elce Sotto 8, I-06123 Perugia, Italy
000232248 700__ $$aMosconi, Edoardo$$uCNR, Computat Lab Hybrid Organ Photovolta CLHYO, ISTM, Via Elce Sotto 8, I-06123 Perugia, Italy
000232248 700__ $$aHagfeldt, Anders$$uEcole Polytech Fed Lausanne, Lab Photomol Sci, Stn 6, CH-1015 Lausanne, Switzerland
000232248 700__ $$0248796$$aSaliba, Michael$$g254026$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232248 773__ $$j29$$k38$$q1702005$$tAdvanced Materials
000232248 909C0 $$0252060$$pLPI$$xU10101
000232248 909CO $$ooai:infoscience.tind.io:232248$$pSB$$particle
000232248 917Z8 $$x105528
000232248 937__ $$aEPFL-ARTICLE-232248
000232248 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000232248 980__ $$aARTICLE