| 초록 |
Three Zn(II)–porphyrin sensitizers, coded as SGT-023, SGT-024 and SGT-025 were designed and synthesized through acceptor structural engineering. The photovoltaic performances of SGT sensitizer-based DSSCs were systematically evaluated with SGT-020 and SGT-021 as a reference sensitizer. The effect of the acceptor ability on photovoltaic performances was investigated for establishing the structure-performance relationship in the platform of D-π-A porphyrin sensitizers. By introducing a more planar acceptor unit in the porphyrin dyes, the power conversion efficiency (PCE) was reduced with the decreased short-circuit current (Jsc) and open-circuit voltage (Voc), due to the change of electron withdrawing ability in acceptor part. As a consequence, we obtained a maximum PCE of 5.6% for SGT-023, 4.2% for SGT-024 and 11.0% for SGT-025. |
