Realizing the efficiency-stability balance for all-polymer photovoltaic blends

Abstract

Though the power conversion efficiency (PCE) of organic solar cell (OSC) has been pushed over 19% under 1 sun illumination, its stability is still the short board impeding the commercialization,...

Tuning the Crystallinity and Phase Separation by Two‐Step Annealing Enables Block Copolymer‐Based Organic Solar Cells with 15% Efficiency

“…[ 23 ] The structure of PM6‐b‐PY‐IT is given in Figure S1, Supporting Information, which can also be referred to in literatures as well as its absorption profile and molecular weight distribution. [ 24 ]…”

“…The material we used namely PM6-b-PY-IT is the same batch polymer with previous work, based on the same synthesis method. [23,24] As its purity (low content of donor-only or acceptor-only polymer segment) was well defended by the literature, we chose to call the material block copolymer, but still not single-component one. [23] The structure of PM6-b-PY-IT is given in Figure S1, Supporting Information, which can also be referred to in literatures as well as its absorption profile and molecular weight distribution.…”

“…[23] The structure of PM6-b-PY-IT is given in Figure S1, Supporting Information, which can also be referred to in literatures as well as its absorption profile and molecular weight distribution. [24] The devices were fabricated based on the conventional structure of ITO/PEDOT:PSS-PA/block copolymer/PFN-Br-MA/Ag. [34,35] The current density versus voltage ( J-V ) curves are illustrated in Figure 1a, with corresponding parameters listed in Table 1.…”

“…[12][13][14][15][16][17][18][19][20][21] At the same time, different from the binary all-polymer blend with polymer donor and polymer acceptor, the one-pot-synthesized block copolymer systems are also considered a rising star for pursing the balance of efficiency and stability. [22][23][24][25] Accordingly, the prospect of promoting the efficiency of block copolymer-based OSCs could be bright, as its units are chemically bonded together, which would be beneficial to resisting the morphology degradation. However, this characteristic also brings difficulty to effectively promote the film's initial morphology, which is vital to determining the PCE of devices.…”

Highly efficient and stable binary all-polymer solar cells enabled by sequential deposition processing tuned microstructures

“…[21][22][23][24][25][26][27][28][29] Nonetheless, the operational and mechanical stability difficulties come back again, due to PSMAs partially inheriting the properties of small molecules. [30][31][32][33] Since current PSMA-type materials are the most promising candidates for high-efficiency, more efforts in boosting device stability are required that rely not only on chemistry innovation, but also effective device fabrication methods.…”