Abstract
Energy sustainability in the present era is associated with the adoption of the integrated and consolidated approach to generate, convert, and store energy. Current investigation is demonstrative of the first exploration of the novel CsPbI2.2Br0.8 transformed by lanthanide triple doping forming [Sm3+-Eu3+-Tm3+]:CsPbI2.2Br0.8 (SET:CPVSK). Also, SET:CPVSK is the for the first time employed in multitudinous energy applications. SET:CPVSK excelled over the pristine material with the minimal alterations in the band gap energy spanning around 1.65 – 1.72 eV tracked for 28 days. With the cubic phase, SET:CPVSK thin films exhibited excellent morphology with the tighter binding to substrate. As light harvesting layers inside entirely ambient perovskite solar cells, the efficiency of the cells increased to 16.31 % from 7.49 % upon doping with an improvement in other photovoltaic features also. Electro-catalytic response of the SET:CPVSK towards hydrogen generation was magnanimous with the lower overpotential and kinetic Tafel slope of 130 mV and 116.5 mV dec−1, signifying Volmer-Heyrovsky mechanistic route. With the service life of 100 min, the developed electro-catalyst expressed sustainable output. In terms of the charge storage, the unit capacity was improved to 622.4 mAH g−1 upon doping while the other electrode can only reach up to 394.2 mAH g−1. Furthermore, the resistive response of this electrode was also appreciable with the lower equivalent series resistance (Rs) i.e. 0.41 Ω, showing auspiciousness for practical applications.
Published Version
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