“…Because of their light weight, low cost, and exibility, p-conjugated polythiophenes (PTs) are promising candidates for various optoelectronic device applications, including polymer light-emitting devices, 1,2 electrochromic devices, 3 organic eldeffect transistors, 4,5 photovoltaic (PV) cells, [6][7][8][9][10][11][12][13][14][15] and uorescent chemosensors. [16][17][18][19] Polymer-based photovoltaic cells (PVCs) typically contain a layer comprising a blend of PT and a fullerene derivative. 20 The illumination of PVC creates excitons, which separate at the interface between the PT and the fullerene derivative.…”