Fig. 1: Fundamentals of the dual-irradiation system.
From: Two quasi-interfacial p-n junctions observed by a dual-irradiation system in perovskite solar cells
a Left: schematic drawing of the dual-irradiation system, showing a device configuration of FTO/TiO2/perovskite/spiro-OMeTAD/Au/ITO; Right: the energy level diagram of the device. b The fabrication processes of the dual-side function solar cell. c The cross-section SEM image of the fabricated device with a 22.5 nm Au layer. Cl-TiO2 compact TiO2, Mp-TiO2 mesoporous TiO2, spiro-OMeTAD 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene.
