Abstract
Present investigation reports the first investigation on cesium lead halide (CsPbI1.8Br1.2) semiconductor doped with lanthanides forming a [Sm-Eu-Tm]:CsPbI1.8Br1.2 system. This material was analyzed for time dependent response at the ambient conditions expressing stability reflected by minimal alterations in band energy spanning over 1.78–2.07 eV for an extended duration. With the 47.68 nm average crystallite size, the developed material expressed maximum contact when deposited in the form of thin films. [Sm-Eu-Tm]:CsPbI1.8Br1.2 used as an active photo-harvester in perovskite solar cells (PSCs) excelled in acquisition of 12.81 % efficiency. Fhe fabricated electrode accomplished specific capacitance of 429.3 F g−1. Impedance analysis indicated the excellent ionic diffusion with minimal resistance, which improved the electrical energy storage. Finally, the water splitting experiments were suggestive of the developed material as an effective H2 electro-catalyst with lower ηHER i.e. 146 mV and Tafel slope i.e. 120.4 mV dec−1 when equated with the O2 evolution.
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