Face-on oriented hydrophobic conjugated polymers as dopant-free hole-transport materials for efficient and stable perovskite solar cells with a fill factor approaching 85%

Abstract

Developing high-performance dopant-free hole transport material (DF-HTM) is critical to realizing stable perovskite solar cells (PSCs). Herein, a class of siloxane-terminated polymers (PBZ-Si) with low surface energy were studied as...

Benzotriazole based polymers with different side chains employed as dopant-free hole-transporting materials for high-efficiency perovskite solar cells

“…49 Binding energies of I 3d 5/2 (628.9 eV) and I 3d 3/2 (630.4 eV) shift around 0.6 eV to 628.3 eV and 629.8 eV after perovskite was covered with HTMs, which is attributed to F substituents of aromatic rings. 50 Both indicate that the interaction between HTMs and perovskite reduces the valence electrons involved in the bond.…”

Achieving 31% efficiency in organic photovoltaic cells under indoor light using a low energetic disorder polymer donor

“…Additionally, these polymers exhibit wide bandgaps and variable molecular energy levels, and could be interesting as dopant-free hole transport materials for high-performance perovskite solar cells. [39][40][41]…”

Recent advances in dopant-free organic hole-transporting materials for efficient, stable and low-cost perovskite solar cells

“…In addition, a series of bifunctional copolymers with different numbers of siloxane-terminated side chains were prepared by Gao and Zhang as dopant-free HTMs in PSCs. 152 The introduction of siloxane-terminated side chains endowed the polymers with passivation of Pb 2+ defects via the Pb–O interaction and enhanced the hydrophobicity. Furthermore, the hole mobilities gradually enhanced with the increase in the number of siloxane-terminated side chains.…”