Recently, organic electrochemical crystals (OECT) using conjugated polymers
as channel materials have become a hot research topic due to their ease of preparation, ionelectron conversion capability and biointerface compatibility. However, most of the reported
OECT channel materials for OECT are p-type conjugated polymers (hole transport), while
few OECTs have been developed based on n-type conjugated polymers (electron transport),
and the unbalanced development hinders the realization of complex complementary circuits.
The recently reported n-type Poly (benzimidazobenzophenanthroline) (BBL) OECT of polyconjugated polymers provides an effective solution to the above problem. However, BBL films
are inherently brittle and cannot be stretched to meet the use of flexible devices, which greatly
hinders their application and development. In this work, we propose the preparation of a device
stretchable n-type BBL OECT device and verify its feasibility for sweat sensing.
