Fabrication and characterization of CH₃NH₃PbI₃ solar cells with added guanidinium and inserted with decaphenylpentasilane

Abstract

In this work we investigated the effects of the addition of guanidinium [C(NH2)3; GA] on CH3NH3PbI3 perovskite solar cells fabricated at a high temperature of 190°C in atmospheric air. The addition of GA iodide and the insertion of decaphenylpentasilane between the perovskite and hole transport layer improved the external quantum efficiency and short-circuit current density, and the conversion efficiencies were stable after 1 month. X-ray diffraction showed that the lattice constant of the perovskite crystals was increased by the addition of GA, and addition of GA also improved the surface morphology. First-principles calculations on the density of states and band structures showed reduction of the total energy by the addition of GA and the effectiveness of the nitrogen atoms in GA.

Effects of Guanidinium Addition to CH3NH3PbI3 Perovskite Solar Cells Inserted with Decaphenylpentasilane

“…The band structures and partial DOS of the MAPbI3, MA0.875GA0.125PbI3 and MA0.75GA0.25PbI3 perovskite crystals were calculated by first-principles calculation [59], as shown in Figure 4. Figure 4 shows the 6p orbital of Pb is widely distributed near the conduction band minimum for both crystals.…”

First-principles calculation analysis and photovoltaic properties of Cu compound-added perovskite solar cells

“…39) A polysilane solution was prepared by mixing chlorobenzene (Fujifilm Wako Pure Chemical Corporation, 0.5 ml) with decaphenylcyclopentasilane (DPPS, Osaka Gas Chemicals, Osaka, Japan, OGSOL SI-30-15, 10 mg). [40][41][42][43] The DPPS polysilane solution was spin-coated on the perovskite layer. After the spin-coating, the thin films were annealed from 70 °C to 140 °C in steps of 10 °C, holding each temperature for 25 min.…”

Effects of Adding Alkali Metals and Organic Cations to Cu-Based Perovskite Solar Cells

“…Temperatures of the cells during the air-blowing were set at 90 • C. A polysilane solution was prepared by mixing chlorobenzene (Fujifilm Wako Pure Chemical Corporation, 0.5 mL) with decaphenylcyclopentasilane (DPPS, Osaka Gas Chemicals, Osaka, Japan, OGSOL SI-30-15, 10 mg). During the last 15 s of the third spin-coating of the perovskite precursor solutions, the DPPS polysilane solution was also spin-coated on the perovskite layer [51][52][53][54]. After the spin-coating, the thin films were annealed from 90 to 160 • C in steps of 10 • C, holding each temperature for 10 min [55].…”