Dichlorobenzene dcb

Regioregular poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) of 4002‐EE grade with four different molecular weights (25, 37, 46, 55 kDa) was purchased from Rieke Metals. [6,6]‐phenyl C71 butyric acid methyl ester (PC₇₀BM) of purity >99% was purchased from Solenne. Bismuth oxide nanoparticles (Bi₂O₃) (with a β phase, tetragonal crystal structure; 38 nm diameter; surface area 18 m² g⁻¹) were purchased from Alfa Aesar. X‐ray detectors with different P3HT molecular weighs were fabricated by preparing the P3HT: PC₇₀BM: Bi₂O₃ solution where 80 mg of each P3HT sample was mixed with 80 mg of PC₇₀BM, 80 mg of Bi₂O₃ in 1 mL dichlorobenzene (DCB; 1 mL; anhydrous; Sigma‐Aldrich). The solution was stirred overnight followed by preheating at 60°C for 30 min before deposition of the films. The solution preparation was carried out in a N₂ glove box (MBraun MB20G).

The chemicals used, (poly(vinylidenefluoride-trifluoroethylene-chlorofluoroethylene)) (P(VDF-TrFE-CFE)), poly(methyl methacrylate) (PMMA), benzophenone (BP), dichlorobenzene (DCB) and pentafluoro-benzenethiol (PFBT) were purchased from Sigma Aldrich. N,N-dimethylformamide (DMF) and anisole were purchased from Merck. [2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno] [3,2-b]thiophene) (DPPT-TT) was synthesized in house using a reaction scheme described previously [26 (link)]. All solutions were filtered through a 0.45 µm filter just before use.