Now Available: High-performing Polymer Acceptors - PNDI(2HD)T & PNDI(2HD)2T
Posted on Tue, Mar 06, 2018 by Hunan Yi
Having achieved 10% power conversion efficiencies (PCE), all-polymer solar cells (all-PSCs) have been the subject of significant research interest in recent years. With p-type polymers as electron donors and n-type polymers as electron acceptors, all-PSCs have contributed to the rise of high thermal, mechanical and photochemical device stability - with the prospect of large-area production. Unlike conventional polymer-fullerene solar cells, all-polymer OPVs have the potential to develop into a wider range of polymer materials; with the alteration of their chemical structures to adjust energy levels and film morphology for better device stability and efficiency. Unlike fullerenes, polymer acceptors cover a wider spectrum of visible light and have much higher absorption coefficients.
High-performing polymer donor materials have been intensively studied and well-developed. However, high-performing polymer acceptor materials are yet to be fully explored. Among them, polymer acceptors incorporated with imide-based repeating units (such as naphthalenediimide (NDI) and perylenediimide) are currently the most promising n-type polymer candidates. This is due to their great electron-transporting capabilities and higher electron affinities.
At Ossila, we aim to bring the most advanced and sophisticated materials to our customers. In addition to PNDI2(OD)2T and PNF222 that are already available from Ossila, we are now also providing you with PNDI(2HD)T and PNDI(2HD)2T, copolymers of naphtalene and bithiophene. PNDI(2HD)2T shows a higher degree of crystalline behaviours (that can promote 3D charge transport) compared to PNDI2(OD)2T. PNDI(2HD)T exhibited a PCE of 6.64% with better flexibility, stretching, and bending properties when compared to polymer solar cells with PCBMs as acceptors.
- 9.0% power conversion efficiency from ternary all-polymer solar cells, Z. Li et al., Energy & Environ. Sci., 10, 2212-2221 (2017); DIO: 10.1039/C7EE01858D.
- All-Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane-Functionalized Side Chains with Efficiency over 10%, B. Fan et al., Adv. Mater., 29 (47), 1703906 (2017); DOI: 10.1002/adma.201703906
- Improved Performance of All-Polymer Solar Cells Enabled by Naphthodiperylenetetraimide-Based Polymer Acceptor, Y. Guo et al, Adv. Mater., 29 (26), 1700309 (2017); DOI: 10.1002/adma.201700309.
- Flexible, highly efficient all-polymer solar cells, T. Kim et al., Nat. Commun., 6, 8547 (2015); DOI: 10.1038/ncomms9547.
Author: Hunan Yi
Hunan is Ossila’s organic chemist, specialising in polymers and functional materials synthesis, polymeric semiconductors, and purification of conjugated polymers. Having achieved an MSc from Shanghai China, Hunan moved to St Andrews University to study towards his PhD in Dye-Sensitised Solar Cells where he then remained as Research Fellow until 2004. He then became a Postdoctoral Research Associate at the University of Sheffield, before working with both the University and Ossila as a KTA associate in 2015.