Dendritic-based co-adsorbents for dye-sensitized solar cells: Effect of the generations and alkyl chain lengths

Tseng, Yung Hsiang; Li, Chun Ting; Huang, Guan Wei; Chen, Yung Chung; Jeng, R. J.; Dai, Shenghong A.

doi:10.1016/j.synthmet.2021.116711

Cited by 3 publications

(1 citation statement)

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“…Efforts to discover synthetic alternatives to CDCA have led to exploring various small molecular coadsorbents and additives. ,− However, achieving both a high PCE and long-term stability remains challenging. Dendritic macromolecules and polymers have shown promise, achieving PCEs of about 7.8, 5.8, and 5.7% − though they often underperform compared to CDCA-treated cells . A notable synthetic coadsorbent is poly(4-vinylpyridine) (P4VP), which allowed PCEs of 9% under AM 1.5G illumination and 22% under artificial lighting .…”

Section: Introductionmentioning

confidence: 99%

Improved Interfacial Electron Dynamics with Block Poly(4-vinylpyridine)–Poly(styrene) Polymers for Efficient and Long-Lasting Dye-Sensitized Solar Cells

Rodrigues,

Abreu,

Sauvage

et al. 2024

ACS Appl. Polym. Mater.

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Dye-sensitized solar cells (DSSCs) have recently entered the market for indoor photovoltaics. Fast electron injection from dye to titania, the lifetime of the excited dye, and the suppression of back electron recombination at the photoanode/electrolyte interface are crucial for a high photocurrent conversion efficiency (PCE). This study presents block copolymers of poly(4vinylpyridine) and poly(styrene)-P4VP 67 -b-PSt x (x=23;61) as efficient accelerators of electron injection from dye to titania with extended lifetime excited states and long-lasting back electron recombination suppression. P4VP 67 -b-PSt 23 and P4VP 67 -b-PSt 61 rendered devices with PCEs of 10.0 and 9.8%, respectively, under AM 1.5G light; PCEs of 19.4 and 16.4% under 1000 lx LED light were attained. Copolymers provided a stable PCE with the two most popular I 3 − /3I − electrolytes based on ACN and 3methoxypropionitrile solvents; PCE history was tracked in the dark and under 1000 h of continuous light soaking with passive load according to ISOS-D1 and ISOS-L2 aging protocols, respectively. The impact of the polymer molecular structure on electron recombination, charge injection, dye anchoring, light absorption, photocurrent generation, and PCE and the long-term history of photovoltaic metrics are discussed.

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