Six novel organic dyes (RY1∼RY6) containing spiro[fluorene-9,9′-phenanthren]-10′-one as an auxiliary acceptor were synthesised and effectively used for the fabrication of D-A-π-A type dye-sensitized solar cells (DSSCs). The molecular structures were modified by introducing a novel spiro[fluorene-9,9′-phenanthren]-10′-one auxiliary acceptor group between the donor and the π-bridge. The molecular rigidity can be enhanced by depressing intermolecular aggregation and carbonyl group can trapping the Li⁺ or I₃⁻ ions to retard the charge recombination. The sensitizer RY3 was found to perform remarkable light-harvesting efficiency of 6.30% at AM1.5 solar condition and 21.67% at TL84 (2500 lux) illuminations without DCA co-deposition. For further improvement, a higher efficiency can be achieved through a suitable co-sensitization of N719 and RY3, which displayed an efficiency of 8.55% under one sun (AM 1.5). While operated under indoor light, the efficiency was boosted to 25.57% and 27.04% at 1000 & 2500 lux illuminations, respectively. The high performance of co-sensitization of N719 and RY3 can be ascribed to a high surface coverage and a broader range of absorption wavelength. Stability test of the device co-sensitized with N719 and RY3 showed a mild decay of PCE 3.74% after 96 h, while it retained 84.49% of its original PCE after 336 h in ambient atmosphere without encapsulation.

六种新型有机染料（RY1〜RY6）含有螺[芴-9,9'-菲] -10'酮作为辅助受体合成，有效地用于DA-π-A型染料敏化太阳能电池的制造（DSSC）。通过在供体和π桥之间引入新型螺[芴-9,9'-菲] -10'-一个辅助受体基团来修饰分子结构。分子刚性可通过按下分子间聚集和羰基可捕获锂来增强⁺或I ₃ ^-离子以延缓电荷重组。敏化剂RY3发现在没有DCA共沉积的情况下，在AM1.5太阳能条件下，其集光效率达到了6.30％，在TL84（2500 lux）照明下，性能达到了21.67％。为了进一步改善，可以通过对N719和RY3进行适当的增感来获得更高的效率，N719和RY3在一个阳光下（AM 1.5）显示出8.55％的效率。在室内光线下工作时，在1000和2500 lux照度下，效率分别提高到25.57％和27.04％。N719和RY3共敏化的高性能归因于高的表面覆盖率和更宽的吸收波长范围。与N719和RY3共敏化的设备的稳定性测试 在96 h后，PCE的温和衰减为3.74％，而在无封装的情况下，在336 h后仍保留了其原始PCE的84.49％。