Jyoti Prasad, Hiren K. Machhi, K. K. Sonigara
Apr 22, 2020
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0
Influential Citations
4
Citations
Journal
ACS applied materials & interfaces
Abstract
Here, we report phosphonium based two solid ionic conductors (SICs) named as triphenylphosphonium methyl iodide (TPPMeI) and triphenylphosphonium iodide (TPPHI) prepared via simple protocol at room temperature and were used as an electrolyte for solid state photovoltaic devices (ss-PVDs) showing the open circuit voltage (Voc) exceeding to 800 mV. Here, very first time, detailed electrochemical investigations with theoretical aspects of phosphonium electrolytes were taken into account, where PVDs prepared from these SICs, TPPMeI resulted into the highest power conversion efficiency (PCE) of 4.08 % with Voc of 810 mV. However, this performance was further enhanced up to the PCE of 6.71% with 824 mV of Voc in the presence of additives like LiI and tert-butyl pyridine. This work leads to find the best alternative of liquid and quaternary ammonium ion based electrolytes which suffers from problems like lower Voc (< 800 mV), stability, leakage etc.