000191081 001__ 191081
000191081 005__ 20181203023337.0
000191081 0247_ $$2doi$$a10.1126/science.1243167
000191081 022__ $$a0036-8075
000191081 02470 $$2ISI$$a000325755100040
000191081 037__ $$aARTICLE
000191081 245__ $$aLong-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3
000191081 260__ $$bAmerican Association for the Advancement of Science$$c2013$$aWashington
000191081 269__ $$a2013
000191081 300__ $$a4
000191081 336__ $$aJournal Articles
000191081 520__ $$aLow-temperature solution-processed photovoltaics suffer from low efficiencies because of poor exciton or electron-hole diffusion lengths (typically about 10 nanometers). Recent reports of highly efficient CH3NH3PbI3-based solar cells in a broad range of configurations raise a compelling case for understanding the fundamental photophysical mechanisms in these materials. By applying femtosecond transient optical spectroscopy to bilayers that interface this perovskite with either selective-electron or selective-hole extraction materials, we have uncovered concrete evidence of balanced long-range electron-hole diffusion lengths of at least 100 nanometers in solution-processed CH3NH3PbI3. The high photoconversion efficiencies of these systems stem from the comparable optical absorption length and charge-carrier diffusion lengths, transcending the traditional constraints of solution-processed semiconductors.
000191081 700__ $$uNanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore$$aXing, Guichuan
000191081 700__ $$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore$$aMathews, Nripan
000191081 700__ $$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore$$aSun, Shuangyong
000191081 700__ $$uNanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore$$aLim, Swee Sien
000191081 700__ $$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore$$aLam, Yeng Ming
000191081 700__ $$0240191$$g105292$$uEnergy Res Inst NTU ERI N, Singapore 637553, Singapore$$aGraetzel, Michael
000191081 700__ $$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore$$aMhaisalkar, Subodh
000191081 700__ $$aSum, Tze Chien$$uNanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore
000191081 773__ $$j342$$tScience$$k6156$$q344-347
000191081 909C0 $$xU10101$$0252060$$pLPI
000191081 909CO $$pSB$$particle$$ooai:infoscience.tind.io:191081
000191081 917Z8 $$x105528
000191081 937__ $$aEPFL-ARTICLE-191081
000191081 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000191081 980__ $$aARTICLE