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Thiazolo[5,4- <i>d</i> ]thiazole-based organic sensitizers with improved spectral properties for application in greenhouse-integrated dye-sensitized solar cells
摘要： Organic photosensitizers especially designed for producing semitransparent dye-sensitized solar cells (DSSCs) for greenhouse integration were prepared by introduction of different heterocyclic moieties into the thiazolo[5,4-d]thiazole-molecular scaffold. The aim was that of improving their light absorption capability in the green part of the visible spectrum while maintaining a good transparency in the blue and red regions, where the photosynthetic response is maximized. A short and efficient synthetic approach, featuring two consecutive C-H activation reactions in a one-pot procedure as key steps, was used. Based on their spectroscopic and electrochemical characterization, two of dyes prepared appeared especially suitable for greenhouse-integrated photovoltaics. The corresponding semitransparent DSSCs yielded 5.6-6.1% power conversion efficiencies, which were largely superior to those provided by other organic dyes previously proposed for the same application.
关键词： organic photosensitizers,light absorption,photovoltaic efficiency,dye-sensitized solar cells,greenhouse integration,thiazolo[5,4-d]thiazole,transparency
更新于2025-09-23 15:21:01
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Dicyanovinylene and Thiazolo[5,4-d]thiazole-Core Containing D-A-D Type Hole Transporting Materials for Spiro-OMeTAD Free Perovskite Solar Cell Applications with Superior Atmospheric Stability
摘要： In perovskite solar cell (PSC) devices, hole transporting materials (HTMs) are vital components affecting the charge separation and play an important role in achieving high efficiencies. These may also protect active light-absorbing layers from degradation. The current best-in-class HTM Spiro-OMeTAD is prohibitively expensive for large scale application and hence design of novel cost-effective HTMs yielding comparable device performance is essential. In this manuscript, we report synthesis of donor-acceptor-donor (D-A-D) type hole transporting materials (TTz-1 and TPDCN) featuring the dicyanovinylene and thiazolo[5,4-d]thiazole cores and evaluate their performance via integrating them in perovskite solar cells (PSCs). The results suggest that both the HTMs are easy to synthesize and demonstrate favourable structural characteristics for device integration. Detailed analysis reveals that the molecules showed appropriate energy level alignment with methylammonium lead iodide (CH3NH3PbI3) perovskite, possess good thermal stability and high hole mobility. Planar PSC devices fabricated using TTz-1 as HTM yielded a power conversion efficiency (PCE) of 11.37%, whilst devices using TPDCN shows a PCE of 10.11%, comparable to PCE of 11.62% obtained in control samples based on Spiro-OMeTAD. In additional, stability analysis of the devices shows that devices fabricated using TTz-1 and TPDCN exhibit superior atmospheric stability as compared to those based on Spiro-OMeTAD. These results suggest that the reported HTM architectures are promising leads for designing new HTMs for perovskite solar cells owing to their simple and scalable synthesis and tunability.
关键词： Thiazolo[5,4-d]thiazole,Hole transporting materials,Dicyanovinylene,Perovskite solar cell,Donor-Acceptor-Donor
更新于2025-09-16 10:30:52