000226390 001__ 226390
000226390 005__ 20190507143831.0
000226390 0247_ $$2doi$$a10.1039/C6EE03182J
000226390 02470 $$2ISI
000226390 022__ $$a1754-5706
000226390 02470 $$a000395679100021
000226390 037__ $$aARTICLE
000226390 245__ $$aHighly efficient perovskite solar cells with a compositionally engineered perovskite​/hole transporting material interface
000226390 269__ $$a2017
000226390 260__ $$bRoyal Soc Chemistry$$c2017$$aCambridge
000226390 300__ $$a7
000226390 336__ $$aJournal Articles
000226390 520__ $$aPerovskite solar cells (PSCs) have experienced an outstanding advance in power conversion efficiency (PCE) by optimizing the perovskite layer morphol., compn., interfaces, and charge collection efficiency. To enhance PCE, here we developed a new method i.e., engineering a compositional gradient thinly at the rear interface between the perovskite and the hole transporting materials. We demonstrate that charge collection is improved and charge recombination is reduced by formation of an engineered passivating layer, which leads to a striking enhancement in open-​circuit voltage (VOC)​. The passivation effect induced by constructing an addnl. FAPbBr3-​xIx layer on top of the primary (FAPbI3)​0.85(MAPbBr3)​0.15 film was proven to function as an electron blocking layer within the perovskite film, resulting in a final PCE of 21.3​%. Our results shed light on the importance of the interfacial engineering on the rear surface of perovskite layers and describe an innovative approach that will further boost the PSC efficiency.
000226390 700__ $$g243815$$0248328$$aCho, Kyung Taek
000226390 700__ $$aPaek, Sanghyun
000226390 700__ $$aGrancini, Giulia
000226390 700__ $$aRoldan-Carmona, Cristina
000226390 700__ $$aGao, Peng
000226390 700__ $$aLee, Yonghui
000226390 700__ $$aNazeeruddin, Mohammad Khaja
000226390 773__ $$j10$$tEnergy & Environmental Science$$k2$$q621-627
000226390 909C0 $$xU12965$$0252519$$pGMF
000226390 909CO $$pSB$$particle$$ooai:infoscience.tind.io:226390
000226390 917Z8 $$x105958
000226390 937__ $$aEPFL-ARTICLE-226390
000226390 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000226390 980__ $$aARTICLE