Solution-processed planar perovskite solar cell without a hole ...
Solution-processed planar perovskite solar cell without a hole transport layer Yi Jin, George Chumanov* Department of Chemistry, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, South Carolina 29634, United States Experimental section Materials: Potassium hydroxide (Amresco, reagent grade), zinc acetate dihydrate (J. T. Baker, Baker analyzed reagent) were used as received. ZnO nanoparticles: ZnO nanoparticles were synthesized following a previously reported method.1 Zn(CH3COO)2⋅2H2O (1.958 g, 8.92 mmol) and H2O (200 µL) was dissolved in CH3OH (95 mL) with stirring at 60 °C. KOH (0.972 g, 14.4 mmol) was dissolved in CH3OH (46 mL) with stirring at room temperature. KOH solution was then added to the Zn(CH3COO)2 solution drop by drop with stirring at 60 °C over a period of 13 min. Reaction mixture was further stirred at 60 °C for additional 2 h 15 min. After cooling to room temperature in 1 h, the supernatant was decanted and the precipitate was washed twice with CH3OH following by dispersing in a mixture of n-butanol (28 mL) and chloroform (2.0 mL). ZnO suspension was then filtered through a 0.2 µm PTFE syringe filter before using.
Figure S1. (a) TEM image of ZnO nanoparticles. (b) & (c) SEM and AFM images of ZnO film on a glass/ITO substrate, respectively. (d) UV-Vis spectrum of ZnO film on a quartz substrate. The thickness of the ZnO film was 40 nm.
Figure S2. (a), (b) & (c) SEM, AFM images and UV-vis spectrum of CH3NH3PbI3 on a glass/ITO/ZnO substrate, respectively. The thickness of the CH3NH3PbI3 film was 390 nm.
Figure
S3.
(a)
&
(b) SEM
and
AFM
images
of
graphite
film
on
a
glass/ITO/ZnO/CH3NH3PbI3 substrate, respectively. (c) & (d) UV-vis spectrum of graphite films on quartz and glass/ITO/ZnO/CH3NH3PbI3 substrates, respectively. The thickness of the graphite film was 75 nm.
Figure S4. PCE distribution of devices made by method A. References (1) Jin, Y.; Chumanov, G., Fabrication of Lead Halide Perovskite Film by Controlling Reactivity at Room Temperature in Mixed Solvents. Chem. Lett. 2014, 43, 1722-1724.
Figure S1. (a) TEM image of ZnO nanoparticles. (b) & (c) SEM and AFM images of ZnO film on a glass/ITO substrate, respectively. (d) UV-Vis spectrum of ZnO film on a quartz substrate. The thickness of the ZnO film was 40 nm.
Figure S2. (a), (b) & (c) SEM, AFM images and UV-vis spectrum of CH3NH3PbI3 on a glass/ITO/ZnO substrate, respectively. The thickness of the CH3NH3PbI3 film was 390 nm.
Figure
S3.
(a)
&
(b) SEM
and
AFM
images
of
graphite
film
on
a
glass/ITO/ZnO/CH3NH3PbI3 substrate, respectively. (c) & (d) UV-vis spectrum of graphite films on quartz and glass/ITO/ZnO/CH3NH3PbI3 substrates, respectively. The thickness of the graphite film was 75 nm.
Figure S4. PCE distribution of devices made by method A. References (1) Jin, Y.; Chumanov, G., Fabrication of Lead Halide Perovskite Film by Controlling Reactivity at Room Temperature in Mixed Solvents. Chem. Lett. 2014, 43, 1722-1724.
