TY - JOUR
T1 - Morphology control of perovskite films
T2 - a two-step, all solution process for conversion of lead selenide into methylammonium lead iodide
AU - Shor Peled, Sa’ar
AU - Perez, Maayan
AU - Meron, Dafna
AU - Osherov, Anna
AU - Bulovic, Vladimir
AU - Katz, Eugene A.
AU - Golan, Yuval
N1 - Funding Information:
Expert assistance from Dr Y. Mirsky and Dr S. Kolusheva in XRD and photoluminescence analysis, respectively, is gratefully acknowledged. Fruitful discussions with professor Somobrata Acharya (IACS Kolkata) are gratefully acknowledged. This work was supported by the NSF-BSF joint program, grant #1605406.
Publisher Copyright:
© the Partner Organisations 2020.
PY - 2021/2/7
Y1 - 2021/2/7
N2 - We describe a two-step, all solution process for converting lead selenide thin films into methylammonium lead iodide (MAPbI3) perovskite material. PbSe was deposited on fluorine-doped tin oxide (FTO), and treated with polyiodide solution to form lead iodide. The solvent used was mixtures of isopropanol and water at different ratios. Conversion parameters, namely solvent ratio, potassium iodide (KI) concentration, iodine (I2) concentration and conversion temperature were optimized. A second conversion step, from PbI2to MAPbI3, was carried out by treating the films with a solution of methylammonium iodide (MAI) dissolved in isopropanol. Different morphologies of MAPbI3were achieved by converting PbI2films with different morphologies, and also by converting PbI2films using solutions of variable MAI concentration. Effect of grain size on UV-Vis light absorption and photoluminescence (PL) is discussed: while absorption was found to be lower for the films with smaller grain size, PL was higher, suggesting less non-radiative recombination traps in films containing smaller grain perovskites.
AB - We describe a two-step, all solution process for converting lead selenide thin films into methylammonium lead iodide (MAPbI3) perovskite material. PbSe was deposited on fluorine-doped tin oxide (FTO), and treated with polyiodide solution to form lead iodide. The solvent used was mixtures of isopropanol and water at different ratios. Conversion parameters, namely solvent ratio, potassium iodide (KI) concentration, iodine (I2) concentration and conversion temperature were optimized. A second conversion step, from PbI2to MAPbI3, was carried out by treating the films with a solution of methylammonium iodide (MAI) dissolved in isopropanol. Different morphologies of MAPbI3were achieved by converting PbI2films with different morphologies, and also by converting PbI2films using solutions of variable MAI concentration. Effect of grain size on UV-Vis light absorption and photoluminescence (PL) is discussed: while absorption was found to be lower for the films with smaller grain size, PL was higher, suggesting less non-radiative recombination traps in films containing smaller grain perovskites.
UR - http://www.scopus.com/inward/record.url?scp=85101137489&partnerID=8YFLogxK
U2 - 10.1039/d0qm00771d
DO - 10.1039/d0qm00771d
M3 - Article
AN - SCOPUS:85101137489
SN - 2052-1537
VL - 5
SP - 1410
EP - 1417
JO - Materials Chemistry Frontiers
JF - Materials Chemistry Frontiers
IS - 3
ER -