CH sub(3)NH sub(3)PbI sub(3) from non-iodide lead salts for perovskite solar cells viathe formation of PbI sub(2)

CH sub(3)NH sub(3)PbI sub(3) from non-iodide lead salts for perovskite solar cells viathe formation of PbI sub(2)

We report the formation of CH sub(3)NH sub(3)PbI sub(3 ) from more soluble, non-iodide lead salts like Pb(SCN) sub(2) and Pb(NO sub(3)) sub(2). When exposed to CH sub(3)NH sub(3)I vapours, the colourless lead salts turned yellow before the formation of the black perovskite. Investigation of this yel...

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Veröffentlicht in:Physical chemistry chemical physics : PCCP 2015-04, Vol.17 (16), p.10369-10372
Hauptverfasser: Balaji, Ganapathy, Joshi, Pranav H, Abbas, Hisham A, Zhang, Liang, Kottokkaran, Ranjith, Samiee, Mehran, Noack, Max, Dalal, Vikram L
Format: Artikel
Sprache:eng
Schlagworte:
Anion exchanging
Converting
Devices
Exchange
Formations
Perovskites
Physical chemistry
Vapour
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Zusammenfassung:We report the formation of CH sub(3)NH sub(3)PbI sub(3 ) from more soluble, non-iodide lead salts like Pb(SCN) sub(2) and Pb(NO sub(3)) sub(2). When exposed to CH sub(3)NH sub(3)I vapours, the colourless lead salts turned yellow before the formation of the black perovskite. Investigation of this yellow intermediate suggests that anion exchange (converting lead salts to PbI sub(2)) precedes the perovskite formation. PCEs of 7.6% and 8.4% were achieved for the devices formed from Pb(SCN) sub(2) and Pb(NO sub(3)) sub(2), respectively.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp00073d