Novel D-pi-A organic dyes for DSSCs based on dibenzo[b,h] [1,6] naphthyridine as a pi-bridge
| Autor: | Barn Seckin Arslan, Güzel, Emre, Tugba Kaya, Veysel Durmaz, Merve Keskin, Avcı, Davut, Nebioğlu, Mehmet, Şişman, İlkay |
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| Přispěvatelé: | Arslan, BS, Guzel, E, Kaya, T, Durmaz, V, Keskin, M, Avci, D, Nebioglu, M, Sisman, I, Sakarya Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü, Güzel, Emre, Avcı, Davut, Nebioğlu, Mehmet, Şişman, İlkay |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Photocurrent Materials science Absorption spectroscopy Process Chemistry and Technology General Chemical Engineering Materials Science Electron donor 02 engineering and technology Conjugated system Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Photochemistry 01 natural sciences 0104 chemical sciences Dye-sensitized solar cell chemistry.chemical_compound chemistry Moiety 0210 nano-technology |
| Popis: | A new series of D-pi-A organic dyes bearing fused dibenzo[b,h] [1,6]naphthyridine as the conjugated pi-bridge, a cyanoacrylic acid moiety as the electron acceptor/anchoring group and different electron donor groups such as trimethoxy (5a), methoxy (5b) and dimethylamino (5c), were designed and synthesized for dye-sensitized solar cells (DSSCs), for the first time. The effect of donor groups on the performance of the DSSCs was systematically investigated using optical, electrochemical, theoretical and photovoltaic methods. Compared to dyes 5a and 5b, 5c showed a broader and more red-shifted absorption spectrum due to stronger electron donating ability of dimethylamino moiety, which is beneficial for absorbing more photons and thus generating high photocurrent, As a result, the DSSC fabricated with dye 5c has the highest power conversion efficiency of 5.02% (similar to 60% relative to N719-based standard cell), which is greater than those obtained by 5a and 5b-sensitized solar cells (3.22% and 2.13%, respectively) under standard air mass 1.5 global (AM 1.5 G) conditions. The improved photovoltaic performance mainly came from better photocurrent, as also confirmed by IPCE measurements. These results suggest that dibenzo[b,h] [1,6]naphthyridine pi-bridge bearing a strong electron donor group is a promising candidate to construct effective D-pi-A organic dyes for DSSCs. |
| Databáze: | OpenAIRE |
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