A High Efficiency Nonfullerene Organic Solar Cell with Optimized Crystalline Organizations

Abstract

A well-organized donor-acceptor crystalline structure is examined for high -performance nonfullerene solar cells. By thermal annealing, nanoscale structures of both donor and acceptor domains are successfully modulated, followed by -significant changes in the resulting -photovoltaic characteristics. When annealed at 90 °C, a maximum power conversion efficiency of 7.64% with a -remarkable open-circuit voltage of 1.03 V is obtained.

Acceptor-rich bulk heterojunction polymer solar cells with balanced charge mobilities

“…5iej). According to previous report, the increased RMS in uniform films would facilitate the charge transport agreement with the results of SCLC measurements [55]. For PBDDIDTT: PC 71 BM blend films, flat films with small and similar RMS were obtained.…”

Efficient Charge Transfer and Fine‐Tuned Energy Level Alignment in a THF‐Processed Fullerene‐Free Organic Solar Cell with 11.3% Efficiency

“…Owing to the rapid progress of non‐fullerene acceptors for PSCs, efficient non‐fullerene‐based PSCs were successfully fabricated . These results demonstrate that non‐fullerene‐based PSCs are promising for realizing high V oc and also indicate that the requirements for molecular energy level alignment in non‐fullerene PSCs might be different from those in fullerene‐based PSCs, but this interesting topic has not yet been studied systematically. Specifically, prior studies on fullerene devices focused on electron (ΔLUMO) transfer dynamics only, yet hole (ΔHOMO) transfer dynamics is also very important for non‐fullerene acceptors due to their high optical absorption and substantial contribution to the J sc .…”

Mapping Polymer Donors toward High‐Efficiency Fullerene Free Organic Solar Cells

“…So far, considerable efforts have been dedicated to the development of FREAs . Imide‐functionalized rylene acceptors are usually synthesized by multistep reactions for a subtle balance between charge transport and molecular aggregation, and have shown PCEs of 8% in devices . In comparison, FREAs based on electron‐donating extended fused rings (e.g., indacenodithiophene (IDT) and indacenodithieno[3,2‐ b ]thiophene (IDTT)) with acceptor–donor–acceptor (A–D–A) structure are easily synthesized by simple reactions, and have exhibited PCEs of up to 9%–11% .…”