Wenjin Zhu, Xinkai Qiu, Joonatan E M Laulainen, Hio-Leng Un, Xinglong Ren, Mingfei Xiao, Guillaume Freychet, Petr Vacek, Dion Tjhe, Qiao He, William Wood, Zichen Wang, Youcheng Zhang, Zhengkang Qu, Jesika Asatryan, Jaime Martin, Martin Heeney, Christopher R McNeill, Paul A Midgley, Ian E Jacobs, Henning Sirringhaus
Conjugated polymers are promising materials for thermoelectric applications, however, at present few effective and well understood strategies exist to further advance their thermoelectric performance. Here we report a new model system for better understanding the key factors governing their thermoelectric properties: aligned, ribbon-phase poly[2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT) doped by ion-exchange doping. Using a range of microstructural and spectroscopic methods we study the effect of controlled incorporation of tie-chains between the crystalline domains through blending of high and low molecular weight chains...
April 26, 2024: Advanced Materials