Benzobisthiazole as Weak Donor for Improved Photovoltaic Performance: Microwave Conductivity Technique Assisted Molecular Engineering

2013 ◽  
Vol 24 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Masashi Tsuji ◽  
Akinori Saeki ◽  
Yoshiko Koizumi ◽  
Naoto Matsuyama ◽  
Chakkooth Vijayakumar ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Microwave Conductivity

Molecular Engineering of Ruthenium-based Photosensitizers with Superior Photovoltaic Performance in DSSC: Novel N-Alkyl 2-Phenylindole-based Ancillary Ligands

2022 ◽  
Author(s):  
Saba Ashraf ◽  
Rui Su ◽  
Javeed Akhtar ◽  
Ahmed Shuja ◽  
Humaira Masood Siddiqi ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Molecular Engineering ◽  
Ancillary Ligand ◽  
Ancillary Ligands

In this work, we report the design and successful synthesis of two new heteroleptic polypyridyl Ru(II) complexes (SD-5 and SD-6), by incorporating hetero-aromatic electron-donating N-alkyl-2-phenylindole moieties into the ancillary ligand....

Molecular engineering strategies for fabricating efficient porphyrin-based dye-sensitized solar cells

2020 ◽  
Vol 13 (6) ◽  
pp. 1617-1657 ◽  
Author(s):  
Kaiwen Zeng ◽  
Zhangfa Tong ◽  
Lin Ma ◽  
Wei-Hong Zhu ◽  
Wenjun Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Molecular Engineering ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this review, intra- and intermolecular engineering strategies for improving the efficiencies of porphyrin based dye-sensitized solar cells are briefly summarized, revealing the in-depth structure–photovoltaic performance correlations.

Molecular Engineering of Phenothiazine-Based Monomer and Dimer Hole Transport Materials and Their Photovoltaic Performance

2021 ◽  
pp. 109340
Author(s):  
Mengde Zhai ◽  
Yawei Miao ◽  
Cheng Chen ◽  
Haoxin Wang ◽  
Xingdong Ding ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Hole Transport ◽  
Molecular Engineering

scholarly journals Dopant-Free Triazatruxene-Based Hole Transporting Materials with Three Different End-Capped Acceptor Units for Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 936
Author(s):  
Da Rim Kil ◽  
Chunyuan Lu ◽  
Jung-Min Ji ◽  
Chul Hoon Kim ◽  
Hwan Kyu Kim
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Molecular Engineering ◽  
Structural Hole ◽  
Highest Occupied Molecular Orbital ◽  
Hole Transporting ◽  
Hole Transporting Materials

A series of dopant-free D-π-A structural hole-transporting materials (HTMs), named as SGT-460, SGT-461, and SGT-462, incorporating a planner-type triazatruxene (TAT) core, thieno[3,2-b]indole (TI) π-bridge and three different acceptors, 3-ethylthiazolidine-2,4-dione (ED), 3-(dicyano methylidene)indan-1-one (DI), and malononitrile (MN), were designed and synthesized for application in perovskite solar cells (PrSCs). The effect of three acceptor units in star-shaped D-π-A structured dopant-free HTMs on the photophysical and electrochemical properties and the photovoltaic performance were investigated compared to the reference HTM of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD). Their highest occupied molecular orbital (HOMO) energy levels were positioned for efficient hole extraction from a MAPbCl3−xIx layer (5.43 eV). The hole mobility values of the HTMs without dopants were determined to be 7.59 × 10−5 cm2 V−1 s−1, 5.13 × 10−4 cm2 V−1 s−1, and 7.61 × 10−4 cm2 V−1 s−1 for SGT-460-, SGT-461-, and SGT-462-based films. The glass transition temperature of all HTMs showed higher than that of the spiro-OMeTAD. As a result, the molecular engineering of a planer donor core, π-bridge, and end-capped acceptor led to good hole mobility, yielding 11.76% efficiency from SGT-462-based PrSCs, and it provides a useful insight into the synthesis of the next-generation of HTMs for PrSC application.

scholarly journals Molecular photovoltaics that mimic photosynthesis

2001 ◽  
Vol 73 (3) ◽  
pp. 459-467 ◽  
Author(s):  
Michael Grätzel
Keyword(s):  
Solar Cell ◽  
Conversion Efficiency ◽  
Organic Dyes ◽  
Photovoltaic Performance ◽  
Internal Surface ◽  
Photovoltaic Cell ◽  
Molecular Engineering ◽  
Internal Surface Area ◽  
Inorganic Semiconductors ◽  
Light Absorbers

Learning from the concepts used by green plants, we have developed a photovoltaic cell based on molecular light absorbers and mesoporous electrodes. The sensitized nanocrystalline injection solar cell employs organic dyes or transition-metal complexes for spectral sensitization of oxide semiconductors, such as TiO2, ZnO, SnO2, and Nb2O5. Mesoporous films of these materials are contacted with redox electrolytes, amorphous organic hole conductors, or conducting polymers, as well as inorganic semiconductors. Light harvesting occurs efficiently over the whole visible and near-IR range due to the very large internal surface area of the films. Judicious molecular engineering allows the photoinduced charge separation to occur quantitatively within femtoseconds. The certified overall power conversion efficiency of the new solar cell for standard air mass 1.5 solar radiation stands presently between 10 and 11. The lecture will highlight recent progress in the development of solar cells for practical use. Advancement in the understanding of the factors that govern photovoltaic performance, as well as improvement of cell components to increase further its conversion efficiency will be discussed.

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