000232782 001__ 232782
000232782 005__ 20190317000902.0
000232782 0247_ $$2doi$$a10.1126/science.aam5655
000232782 022__ $$a0036-8075
000232782 02470 $$2ISI$$a000414847100040
000232782 037__ $$aARTICLE
000232782 245__ $$aPerovskite solar cells with CuSCN hole extraction layers yield stabilized efficiencies greater than 20%
000232782 260__ $$aWashington$$bAmerican Association for the Advancement of Science$$c2017
000232782 269__ $$a2017
000232782 300__ $$a4
000232782 336__ $$aJournal Articles
000232782 520__ $$aPerovskite solar cells (PSCs) with efficiencies greater than 20% have been realized only with expensive organic hole-transporting materials. We demonstrate PSCs that achieve stabilized efficiencies exceeding 20% with copper(I) thiocyanate (CuSCN) as the hole extraction layer. A fast solvent removal method enabled the creation of compact, highly conformal CuSCN layers that facilitate rapid carrier extraction and collection. The PSCs showed high thermal stability under long-term heating, although their operational stability was poor. This instability originated from potential-induced degradation of the CuSCN/Au contact. The addition of a conductive reduced graphene oxide spacer layer between CuSCN and gold allowed PSCs to retain >95% of their initial efficiency after aging at a maximum power point for 1000 hours under full solar intensity at 60 degrees C. Under both continuous full-sun illumination and thermal stress, CuSCN-based devices surpassed the stability of spiro-OMeTAD-based PSCs.
000232782 700__ $$0249416$$aArora, Neha$$g251627$$uEcole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232782 700__ $$0248260$$aDar, M. Ibrahim$$g228963$$uEcole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232782 700__ $$aHinderhofer, Alexander
000232782 700__ $$0247078$$aPellet, Norman$$g179666$$uEcole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232782 700__ $$aSchreiber, Frank
000232782 700__ $$0240194$$aZakeeruddin, Shaik Mohammed$$g106763$$uEcole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232782 700__ $$0240191$$aGraetzel, Michael$$g105292$$uEcole Polytech Fed Lausanne, Dept Chem & Chem Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000232782 773__ $$j358$$k6364$$q768-771$$tScience
000232782 8564_ $$s4454290$$uhttps://infoscience.epfl.ch/record/232782/files/EPFL-ARTICLE-232782.pdf$$yn/a$$zn/a
000232782 909C0 $$0252060$$pLPI$$xU10101
000232782 909CO $$ooai:infoscience.tind.io:232782$$pSB$$particle$$qGLOBAL_SET
000232782 917Z8 $$x169202
000232782 917Z8 $$x169202
000232782 937__ $$aEPFL-ARTICLE-232782
000232782 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000232782 980__ $$aARTICLE