981
Molecular Engineering of Low-Bandgap Porphyrins for Highly Efficient Organic Solarcells

Thursday, 2 June 2022: 14:40
West Meeting Room 205 (Vancouver Convention Center)
V. Cuesta, M. Vartanian (Universidad de Castilla-La Mancha), P. de la Cruz (Universidad Castilla-la Mancha), G. D. Sharma (The LNM Institute of Information Technology, Jamdoli, Jaipur), and F. Langa (Universidad de Castilla La Mancha)
Organic solar cells (OSCs) based on solution-processed bulk heterojunction (BHJ) active layers have emerged as promising solutions for the conversion of solar energy into electrical energy in building and indoor applications due to their unique advantages, such as being lightweight and semitrans-parent and the possibility of being processed by low-cost roll-to-roll methods. The BHJ active layer employed for OSCs consists of a blend of an electron-donating material and an electron-accepting material creating internal donor-acceptor heterojunctions, and their optical and electrochemical properties are very important for the realization of a high-power conversion efficiency (PCE).

The optical and electrochemical properties of porphyrins can be adjusted by molecular design and functionalization on the b or meso positions of the porphyrin ring as well as by introduction of different central metal ions.

Although the pioneering use of porphyrins in OSCs was disappointing, as reported efficiencies were very low; the situation has changed over the last five years as Zn-porphyrins with ABAB structures linked to acceptor units, having relatively long-lived singlet excited states, have been successfully used as donors or acceptors, resulting in increased efficiencies.

Here, I´ll present our recent work in design, synthesis, and application of porphyrin-based small molecules for highly efficient OSCs with VOC>1V and PCE>15%.

References

  1. V. Cuesta, M. Vartanian, P. de la Cruz, R. Singhal, G. D. Sharma and F. Langa, J. Mater. Chem. A,2017, 5, 1057.
  1. S. Arrechea, A. Aljarilla, P. de la Cruz, M. K. Singh, G. D. Sharma, F. Langa. J. Mater. Chem. C,

2017, 5, 4742.

  1. M. Vartanian, R. Singhal, P. de la Cruz, S. Biswas, G. D. Sharma and F. Langa, ACS Appl. Energy

Mater. 2018, 1, 1304.

  1. M. Vartanian, P. de la Cruz, F. Langa, S. Biswas, G. D. Sharma. Nanoscale, 2018, 10, 12100.
  2. M. Vartanian, R. Singhal, P. de la Cruz, G. D. Sharma, F. Langa, Chem. Commun, 2018, 54, 14144.
  3. V. Cuesta, R. Singhal, P. de la Cruz, G. D. Sharma, F. Langa, ACS Appl. Mater. Interfaces, 2019, 11, 7216 .
  4. Cuesta, R. Singhal, P. de la Cruz, G. D. Sharma, F. Langa, ChemSusChem 2021, 14, 3439.
  5. H. Dahiya, V. Cuesta, P. de la Cruz, F. Langa, G. D. Sharma ACS Appl. Energy Mater. 2021, 4, 4498.
See more of: B08 - Porphyrinoids and Energy Conversion
See more of: B08: Porphyrins, Phthalocyanines, and Supramolecular Assemblies
See more of: Carbon Nanostructures and Devices
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