Table 2 Optical and photophysical properties of the PBI derivatives in chloroform solution, and as annealed spin-coated PBI thin films

From: Anomalous deep-red luminescence of perylene black analogues with strong π-π interactions

Sample

λabsa/nm

λema/nm

τF/ns

ΦF/%

4,6-ab-PBI

Solution

528

530

0.3 (40%),

4.1 (60%)b

1

 

Film

628

708

0.7

2

6,8-ab-PBI

Solution

528

530

0.3 (72%),

4.7 (28%)b

1

 

Film

557/577

668

1.9

27

8,10-ab-PBI

Solution

527

530

0.2 (52%),

4.3 (48%)b

2

 

Film

559

684

6.1

60

  1. aThe given values are those for the maximum of the largest wavelength absorption and emission band.
  2. bBiexponential fits, obtained by deconvolution; fractional intensities are given in parentheses.
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