TY  - JOUR
AU  - Lehner, Lukas E.
AU  - Demchyshyn, Stepan
AU  - Frank, Kilian
AU  - Minenkov, Alexey
AU  - Kubicki, Dominik J.
AU  - Sun, He
AU  - Hailegnaw, Bekele
AU  - Putz, Christoph
AU  - Mayr, Felix
AU  - Cobet, Munise
AU  - Hesser, Günter
AU  - Schöfberger, Wolfgang
AU  - Sariciftci, Niyazi Serdar
AU  - Scharber, Markus Clark
AU  - Nickel, Bert
AU  - Kaltenbrunner, Martin
TI  - Elucidating the Origins of High Preferential Crystal Orientation in Quasi‐2D Perovskite Solar Cells
JO  - Advanced materials
VL  - 35
IS  - 5
SN  - 0935-9648
CY  - Weinheim
PB  - Wiley-VCH
M1  - PUBDB-2023-03928
SP  - 2208061
PY  - 2023
AB  - Incorporating large organic cations to form 2D and mixed 2D/3D structures significantly increases the stability of perovskite solar cells. However, due to their low electron mobility, aligning the organic sheets to ensure unimpeded charge transport is critical to rival the high performances of pure 3D systems. While additives such as methylammonium chloride (MACl) can enable this preferential orientation, so far, no complete description exists explaining how they influence the nucleation process to grow highly aligned crystals. Here, by investigating the initial stages of the crystallization, as well as partially and fully formed perovskites grown using MACl, the origins underlying this favorable alignment are inferred. This mechanism is studied by employing 3-fluorobenzylammonium in quasi-2D perovskite solar cells. Upon assisting the crystallization with MACl, films with a degree of preferential orientation of 94
LB  - PUB:(DE-HGF)16
C6  - pmid:36305028
UR  - <Go to ISI:>//WOS:000896588500001
DO  - DOI:10.1002/adma.202208061
UR  - https://bib-pubdb1.desy.de/record/586515
ER  -