1 research outputs found
Chalcogen Atoms Regulate the Organic Solar Cell Performance of B–N-Based Polymer Donors
Donor
polymers play a key role in the development of organic solar
cells (OSCs). B–N-based polymer donors, as new types of materials,
have attracted a lot of attention due to their special characteristics,
such as high E(T1), small ΔEST, and easy synthesis, and they can be processed
with real green solvents. However, the relationship between the chemical
structure and device performance has not been systematically studied.
Herein, chalcogen atoms that regulate the OSCs performance of B–N-based
polymer donors were systematically studied. Fortunately, the substitution
of a halogen atom did not affect the high E(T1) and small ΔEST character
of the B–N-based polymer. The absorption and energy levels
of the polymer were systematically regulated by O, S, and Se atom
substitution. The PBNT-TAZ:Y6-BO-based OSCs device demonstrated a
high power conversion efficiency of 15.36%. Moreover, the layer-by-layer
method was applied to further optimize the device performance, and
the PBNT-TAZ/Y6-BO-based OSCs device yielded a PCE of 16.34%. Consequently,
we have systematically demonstrated how chalcogen atoms modulated
the electronic properties of B–N-based polymers. Detailed and
systematic structure–performance relationships are important
for the development of next-generation B–N-based materials