Random D1–A1–D1–A2 terpolymers based on diketopyrrolopyrrole and benzothiadiazolequinoxaline (BTQx) derivatives for high-performance polymer solar cells

Abstract

The overall power conversion efficiency of the polymer solar cell based on P13 (DPP/BTQx ratio is 1/1) showed the highest value of 9.20% with a Voc of 0.86 V, Jsc of 15.74 mA cm−2, and FF of 0.68.

Recent progress of ultra-narrow-bandgap polymer donors for NIR-absorbing organic solar cells

“…To address this problem, new D-A1-D-A2-type polymer donors using two kinds of accepting building blocks, DPP and BTQx, were developed to modulate the optical bandgap and its photovoltaic properties. 72 for CDT-FBSE and 0.24% for CDT-PSE, the broad photoresponse wavelength over 1,000 nm has great potential for NIR applications.…”

“…Sharma et al reported benzothiadiazole quinoxaline (BTQx) derivatives. 72,73 The strong electron-accepting building block BTQx, in which the Qx derivative is fused onto the BT, is a suitable candidate to narrow the band gap because it can easily induce a stabilized quinoidal resonance form. Among the BTQx derivatives, fluorene-substituted BTQx and the corresponding polymers (BT-P3 and BT-P4) were designed and developed.…”

“…To address this problem, new D–A1–D–A2-type polymer donors using two kinds of accepting building blocks, DPP and BTQx, were developed to modulate the optical band gap and their photovoltaic properties. 72 Considering P11–P15, P15, containing DPP:BTQx contents of 0 : 100, displayed the narrowest optical band gap at 1.14 eV. With increasing DPP content, the optical band gaps of the polymer donor gradually increased from 1.15 to 1.30 eV.…”

“…photovoltaic properties 72. Considering P11-P15, P15, containing DPP:BTQx contents of 0:100, displayed the narrowest optical bandgap at 1.14 eV.…”

Recent Advances in the Synthesis of Electron Donor Conjugated Terpolymers for Solar Cell Applications

“…A series of terpolymers (P51-P55) ( Figure 6) were synthesized by mixing different feed amounts of monomers based on benzothiadiazolequinoxaline (BTQx), DPP and BDT based molecular units (Keshtov et al, 2019). P51 and P55 are reference polymers with no BTQx and DPP, respectively.…”