%0 Journal Article
%A Eliwi, Abed Alrhman
%A Malekshahi Byranvand, Mahdi
%A Fassl, Paul
%A Khan, Motiur Rahman
%A Hossain, Ihteaz Muhaimeen
%A Frericks, Markus
%A Ternes, Simon
%A Abzieher, Tobias
%A Schwenzer, Jonas A.
%A Mayer, Thomas
%A Hofmann, Jan P.
%A Richards, Bryce S.
%A Lemmer, Uli
%A Saliba, Michael
%A Paetzold, Ulrich W.
%T Optimization of SnO2 electron transport layer for efficient planar perovskite solar cells with very low hysteresis
%J Materials advances
%V 3
%N 1
%@ 2633-5409
%C Cambridge
%I Royal Society of Chemistry
%M FZJ-2021-05669
%P 456-466
%D 2022
%X Nanostructured tin oxide (SnO2) is a very promising electron transport layer (ETL) for perovskite solar cells (PSCs) that allows low-temperature processing in the planar n–i–p architecture. However, minimizing current–voltage (J–V) hysteresis and optimizing charge extraction for PSCs in this architecture remains a challenge. In response to this, we study and optimize different types of single- and bilayer SnO2 ETLs. Detailed characterization of the optoelectronic properties reveals that a bilayer ETL composed of lithium (Li)-doped compact SnO2 (c(Li)-SnO2) at the bottom and potassium-capped SnO2 nanoparticle layers (NP-SnO2) at the top enhances the electron extraction and charge transport properties of PSCs and reduces the degree of ion migration. This results in an improved PCE and a strongly reduced J–V hysteresis for PSCs with a bilayer c(Li)-NP-SnO2 ETL as compared to reference PSCs with a single-layer or undoped bilayer ETL. The champion PSC with c(Li)-NP-SnO2 ETL shows a high stabilized PCE of up to 18.5% compared to 15.7%, 12.5% and 16.3% for PSCs with c-SnO2, c(Li)-SnO2 and c-NP-SnO2 as ETL, respectively.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000717741700001
%R 10.1039/D1MA00585E
%U https://juser.fz-juelich.de/record/904099