Healing the degradable organic–inorganic heterointerface for highly efficient and stable organic solar cells

Abstract

The heterointerface between the contacted organic and inorganic semiconductors critically affects the charge extraction, hence overall performance of organic optoelectronics, especially for organic solar cells (OSCs). Herein, we develop an effective interfacial strategy that simultaneously boosts the chemical, electric, and electronic properties of the organic-inorganic heterointerface of the derived OSCs, through implanting conjugated molecules as selfassemble monolayers (SAMs) to metal oxide nanoparticles (MO NPs). As results, SAM passivated zinc oxide nanoparticles (ZnO NPs) as electron transport layers (ETLs) not only enable the best performed OSCs containing MO ETLs, but also exhibit the most desirable thickness insensitive features (up to 300 nm). In addition, SAM-ZnO ETLs help also substantially improving the photostability of the derived OSCs. Overall, this work can be beneficial to the further development of high-performance and cost-effective OSCs.

Phase-segregation free quasi-2D perovskite/organic tandem solar cells with low Voc loss and efficiency beyond 21%

“…1c, fitting the TRPL curves by the biexponential equation, τ = A 1 exp(− t / τ 1 ) + A 2 exp(− t / τ 2 ), more rapid carrier transfer can be observed from the BA 1.8 PEA 0.2 MA 2 Pb 4 I 13 film to poly-TPD modified NiO x ( τ 1 = 5.1 ns) than to the PTAA modified one (14.9 ns). Besides, compared to PTAA modified NiO x , poly-TPD modified NiO x film exhibits higher conductivity, calculated from the current–voltage ( I – V ) characteristics of the device with the structure of ITO/modified NiO x /Au 54 (Fig. S6†), which could also benefit the charge extraction.…”

Organic–inorganic hybrid cathode interlayer materials for efficient organic solar cells

“…More strikingly, Li et al used another benzoic acid ligand terminated with ethylene glycol ether, to modify ZnO NPs. 76 The obtained S3-ZnO based CIL could deliver PCE over 18% for both binary PM6:BO-4Cl and ternary PM6:BO-4Cl:Y6-1O based OSCs. The S3-ZnO based CIL can be fabricated with thickness up to 300 nm delivering high efficiency and improved stability.…”

Realizing 18.03% efficiency and good junction characteristics in organic solar cells via hydrogen-bonding interaction between glucose and ZnO electron transport layers

“…To construct efficient OSCs with an inverted structure, excellent ETLs such as ZnO, SnO 2 , TiO x , and CsO x exhibit good transparence, high electron mobility and suitable work function (WF). 15–18 ZnO is widely used as an ETL material due to its excellent optical and electrical properties, good film-forming properties, and low annealing temperature. 19–21 The sol–gel technique is a simple and effective method that is used to deposit ZnO ETLs.…”