In:
Advanced Functional Materials, Wiley, Vol. 19, No. 16 ( 2009-08-24), p. 2677-2683
Abstract:
A new hyperbranched polymer ( HB‐car ), constructed fully by carbazole moieties, is successfully synthesized through a one‐pot Suzuki coupling reaction. The resultant polymer is well‐characterized, and its hole‐transporting ability is studied carefully. The device, in which HB‐car is utilized as a hole‐transporting layer and tris‐(8‐hydroxyquinoline) aluminum as an electron‐emitting layer as well as electron‐transporting layer, gives a much higher efficiency (3.05 cd A –1 ), than that of a poly( N ‐vinylcarbazole) based device (2.19 cd A –1 ) under similar experimental conditions. The remarkable performance is attributed to its low energy barrier and enhanced hole‐drifting ability in the HB‐car based device. In addition, for the first time, a field‐effect transistor (FET) based on the hyperbranched polymer is fabricated, and the organic FET device shows that HB‐car is a typical p ‐type FET material with a saturation mobility of 1 × 10 –5 cm 2 V –1 s –1 , a threshold voltage of –47.1 V, and an on‐to‐off current ratio of 10 3 .
Type of Medium:
Online Resource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.200900513
Language:
English
Publisher:
Wiley
Publication Date:
2009
detail.hit.zdb_id:
2029061-5
detail.hit.zdb_id:
2039420-2
SSG:
11
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