甲眯铅碘薄膜生长动力学过程研究及其高稳定性的甲眯铅碘钙钛矿电池(郗俊,Nano Energy26(2016)438–445)


2016-08-08
 

Initiating crystalgrowthkineticsof α-HC(NH2)2PbI3 for flexiblesolarcells withlong-termstability
 

Jun Xi a,1, ZhaoxinWu a,n,1, KaiXi b,1, HuaDong a, BinXia a, TingLei a, FangYuan a,
WenWu a, BoJiao a, XunHou

 

Flexibleandstableenergyconversiondevicesarecorecomponentsfornextgeneration flexibleelec-
tronics. Perovskitesolarcellsusingformamidiniumleadiodide(FAPbI3) exhibitsuperiorpowercon-
version efficiency (PCE),butthestrenuousprocessofn-i-pconfiguration andtheinstabilityof α-FAPbI3
become inevitableobstaclesforpracticalapplicationin flexibleelectronics.Here,weforthe first time
report theparticularcrystalgrowthprocessof α-FAPbI3 grain withacontrolledsizeforthedevelopment
of flexibleperovskitesolarcells.Throughmorphology,elementandthermostabilitymeasurements,the
crystalline sizeand film homogeneityarefoundtomainlydependingondecentthermalenergyand
doping densityofmethylammoniumbromine.Additionally,stable “pseudocubic” lattice withlarger
crystalline sizeisestablishedowingtothevariedtolerancefactor.Wedemonstratedthatthe flexible
solar cellsexhibitinganaveragePCEof12.4170.52% (theoptimal13.03%),whichslightlydecreasedto
10.9871.00%(theoptimal12.0%)overonemonthat35%humiditywithoutencapsulation,basedonthe
modified α-FAPbI3 for mostefficient devices.Thisworkfavorstheunderstandingofthecrystalgrowth
kinetics of α-FAPbI3 for flexiblesubstrate,andpavesthewayforpotentialapplicationof flexibleelec-
tronics.