| 초록 |
Quantum-dot-sensitized solar cell (QDSSC) has been considered as an alternative to new generation photovoltaics, but it still presents low stability. Besides the continuous effort on improving photoanodes and electrolytes, the focused investigation on charge transfer at interfaces and rational design for counter electrodes are recently receiving much attention. The development of a stable counter electrode (CE) for quantum dot sensitized solar cells (QDSSCs) is still challenging. In this work, a Cu/Ni film has been pre-prepared via a novel redox reaction between Ni foam and Cu ions. Further, a Cu2S/Ni CE was fabricated by sulfidation of the Cu/Ni film. A improved photovoltaic conversion efficiency for a ZCISSe QDSSCs composed of the Cu2S/Ni CE was obtained, with the performance being attributed to the improved catalytic activity, high conductivity and good adhesion between Ni_Cu2S and FTO glass.
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