TY - JOUR
T1 - Designing emissive conjugated polymers with small optical gaps
T2 - A step towards organic polymeric infrared lasers
AU - Shukla, Alok
AU - Mazumdar, Sumit
PY - 1999/1/1
Y1 - 1999/1/1
N2 - We show that chemical modification of the trans-polyacetylene structure that involves substitution of the backbone hydrogen atoms with conjugated side groups leads to reduction of the backbone bond alternation as well as screening of the effective Coulomb interaction. Consequently, the optical gap of the substituted material is smaller than the parent polyene with the same backbone length, and the excited state ordering is conducive to efficient photoluminescence. In the ideal long chain limit, the design of organic polymeric infrared lasers thereby becomes possible.
AB - We show that chemical modification of the trans-polyacetylene structure that involves substitution of the backbone hydrogen atoms with conjugated side groups leads to reduction of the backbone bond alternation as well as screening of the effective Coulomb interaction. Consequently, the optical gap of the substituted material is smaller than the parent polyene with the same backbone length, and the excited state ordering is conducive to efficient photoluminescence. In the ideal long chain limit, the design of organic polymeric infrared lasers thereby becomes possible.
UR - http://www.scopus.com/inward/record.url?scp=0000388546&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000388546&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.83.3944
DO - 10.1103/PhysRevLett.83.3944
M3 - Article
AN - SCOPUS:0000388546
SN - 0031-9007
VL - 83
SP - 3944
EP - 3947
JO - Physical review letters
JF - Physical review letters
IS - 19
ER -