000227707 001__ 227707
000227707 005__ 20190507143831.0
000227707 0247_ $$2doi$$a10.1002/aenm.201601674
000227707 022__ $$a1614-6832
000227707 02470 $$2ISI$$a000397007100019
000227707 037__ $$aARTICLE
000227707 245__ $$aHigh-Efficiency Perovskite Solar Cells Using Molecularly Engineered, Thiophene-Rich, Hole-Transporting Materials: Influence of Alkyl Chain Length on Power Conversion Efficiency
000227707 260__ $$bWiley-V C H Verlag Gmbh$$c2017$$aWeinheim
000227707 269__ $$a2017
000227707 300__ $$a8
000227707 336__ $$aJournal Articles
000227707 520__ $$aThe synthesis and characterization of a series of novel small-molecule holetransporting materials (HTMs) based on an anthra [1,2-b: 4,3-b': 5,6-b '': 8,7-b '''] tetrathiophene (ATT) core are reported. The new compounds follow an easy synthetic route and have no need of expensive purification steps. The novel HTMs are tested in perovskite solar cells and power conversion efficiencies (PCE) of up to 18.1% under 1 sun irradiation are measured. This value is comparable with the 17.8% efficiency obtained using 2,2', 7,7'-tetrakis(N, Ndi- p-methoxyphenylamine)-9,9'-spirobifluorene as a reference compound. Similarly, a significant quenching of the photoluminescence in the first nanosecond is observed, indicative of effective hole transfer. Additionally, the influence of introducing aliphatic alkyl chains acting as solubilizers on the device performance of the ATT molecules is investigated. Replacing the methoxy groups on the triarylamine sites by butoxy-, hexoxy-, or decoxy-substituents greatly improves the solubility of the compounds without changing the energy levels, yet at the same time significantly decreasing the conductivity as well as the PCE, 17.3% for ATT-OBu, 15.7% for ATT-OHex, and 9.7% for ATT-ODec.
000227707 700__ $$g256885$$0248916$$aZimmermann, Iwan
000227707 700__ $$aUrieta-Mora, Javier
000227707 700__ $$aGratia, Paul
000227707 700__ $$aArago, Juan
000227707 700__ $$aGrancini, Giulia
000227707 700__ $$aMolina-Ontoria, Agustin
000227707 700__ $$aOrti, Enrique
000227707 700__ $$aMartin, Nazario
000227707 700__ $$aNazeeruddin, Mohammad Khaja
000227707 773__ $$j7$$tAdvanced Energy Materials$$k6$$q1601674
000227707 909C0 $$xU12965$$0252519$$pGMF
000227707 909CO $$pSB$$particle$$ooai:infoscience.tind.io:227707
000227707 917Z8 $$x105958
000227707 937__ $$aEPFL-ARTICLE-227707
000227707 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000227707 980__ $$aARTICLE