Scalable synthesis of Ti-doped MoO₂ nanoparticle-hole-transporting-material with high moisture stability for CH₃NH₃PbI₃ perovskite solar cells

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Ti doped MoO<SUB>2</SUB> nanoparticles with high BET surface area of 135m<SUP>2</SUP>/g were synthesized via scalable solvothermal cracking of polycrystalline MoO<SUB>3</SUB> microparticles prepared by ultrasonic spray pyrolysis. The pristine MoO<SUB>2</SUB> and Ti doped MoO<SUB>2</SUB> nanoparticles showed metallic conductivity, whereas the MoO<SUB>3</SUB> microparticles had semi-conducting behavior. In addition, the Ti doping in MoO<SUB>2</SUB> nanoparticles formed stronger MoO bond than the pristine MoO<SUB>2</SUB> and consequently exhibited improved stability against humidity. Accordingly, the p-i-n type planar CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> perovskite solar cells with Ti doped MoO<SUB>2</SUB> inorganic hole transporting material showed 15.8% of power conversion efficiency at 1 Sun condition (100mW/cm<SUP>2</SUP>) and significantly improved humidity stability.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highly stable Ti-doped MoO<SUB>2</SUB> nanoparticles were synthesized by solvo-thermal cracking process. </LI> <LI> The p-type Ti-doped MoO<SUB>2</SUB> was used to hole transporting materials for perovskite solar cells. </LI> <LI> The stability of CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> perovskite solar cell was enhanced. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>