We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
New narrow-band-gap thiazoloquinoxaline-containing polymers and their use in solar cells with bulk heterojunction.
- Authors
Keshtov, M.; Kuklin, S.; Konstantinov, I.; Krayushkin, M.; Radychev, N.; Khokhlov, A.
- Abstract
Two new regioregular polymers P1 and P2 with structure of type D-A1-D-A2 have been prepared. The polymers exhibit strong light absorption in the range 300-1100 nm and have band gaps of 1.09 and 1.11 eV, respectively. The HOMO and LUMO energies for P1 and P2 are-5.08/-3.81 and-5.16/-3.85 eV, respectively. Polymer solar cells (PSC) based on P1: PCBM (1: 2, v/v) and P2: PCBM (1: 1, v/v) have open-circuit voltage V , short circuit current J , and efficiency of 0.79 and 0.84 V, 8.32 and 9.54 mA/cm, 3.5 and 4.7%, respectively. The PSC based on P2 exhibits higher characteristics due to the presence of fluorine atoms in the structure: their strong electron-withdrawing properties decrease the HOMO level of polymer P2 as compared with that of P1, which increases the V value. Moreover, the formation of additional S∙∙∙F contacts leads to the growth of ordering and crystallinity of polymer P2 as compared with P1, which favors an increase in the values of J and filling factor.
- Subjects
POLYMER structure; SOLAR cell efficiency; NARROW gap semiconductors; BAND gaps; DIFFERENTIAL scanning calorimetry
- Publication
Doklady Chemistry, 2016, Vol 471, Issue 2, p373
- ISSN
0012-5008
- Publication type
Article
- DOI
10.1134/S001250081611001X