Simple Method for Efficient Slot-Die Coating of MAPbI(3) Perovskite Thin Films in Ambient Air Conditions

QC 20200623
Scalable methods for deposition of lead halide perovskite thin films are required to enable commercialization of the highly promising perovskite photovoltaics. Here, we have developed a slot-die coating process under ambient conditions for methylammonium lead iodide (MAPbI(3)) perovskite on heated substrates (about 90 degrees C on the substrate surface). Dense, highly crystalline perovskite films with large grains (100-200 mu m) were obtained by careful adjustment of the deposition parameters, using solutions that are similar but more dilute than those used in typical spin-coating procedures. Without any further after treatments, such as antisolvent treatment or vapor annealing, we achieved power conversion efficiencies up of 14.5% for devices with the following structure: conducting tin oxide glass (FTO)/TiO2/MAPbI(3)/spiro-MeOTAD/Au. The performance was limited by the significant roughness of the deposited films, resulting from the hot-casting method, and the relatively high deposition temperature, which led to a defect-rich surface due to loss of MAI.

Johansson, Malin B,1972-Uppsala universitet,Fysikalisk kemi(Swepub:uu)maljo942 (författare)
Svanström, SebastianUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)sebsv792 (författare)
Cappel, Ute B.KTH,Tillämpad fysikalisk kemi,KTH Royal Inst Technol, Dept Chem, Div Appl Phys Chem, SE-10044 Stockholm, Sweden.(Swepub:uu)uteca781 (författare)
Rensmo, HåkanUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)hakanrm (författare)
Boschloo, GerritUppsala universitet,Fysikalisk kemi(Swepub:uu)gerrbosc (författare)
Uppsala universitetFysikalisk kemi (creator_code:org_t)

Ingår i:ACS Applied Energy Materials: American Chemical Society (ACS)3:5, s. 4331-43372574-0962

Av författaren/redakt...: Vijayan, Anuja; Johansson, Malin ...; Svanström, Sebas ...; Cappel, Ute B.; Rensmo, Håkan; Boschloo, Gerrit

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