Two-dimensional (2D) van der Waals (vdW) materials have
been proven
to be functional materials with excellent performance among flexible
functional optoelectronics. Static strain may have a great influence
on photoinduced charge carriers in a 2D vdW piezoelectric semiconductor.
However, only a few works pay attention to the static-strain-modulated
photoresponsivity of 2D vdW ferroelectric materials. α-In2Se3, a 2D vdW ferroelectric semiconductor from
the family of III–VI compounds in the form of III2–VI3, has attracted considerable attention for
the study of high-performance nanodevices. In this study, we investigate
a flexible α-In2Se3-based transistor on
a polyethylene terephthalate substrate. A competitive mechanism of
carrier mobility and piezoelectric/ferroelectric polarization exists
in the transistor when in-plane strain is applied. The carrier mobility
modulates separation and transport of electron–hole pairs,
whereas piezoelectric/ferroelectric polarization charges modulate
the local band profile tilting. The optimized photoresponsivity is
increased by 200% (illumination intensity is about 454 μW/cm2) while introducing a −0.15% compressive strain when
the wavelength of the laser is about 405 nm. Our results reveal the
strain-modulated photoresponsivity in an α-In2Se3-based flexible transistor, which may offer an approach to
understand strain-modulated flexible functional optoelectronics.
This article describes a conceptual framework for understanding consumer product-colour purchase decisions. Building on previous work, a new primary factor, colour association, is introduced. The purpose of this study is to test whether consumers' colour-associations connect with their product-colour association, and whether colour-association affects consumers' intended product-colour purchase decisions. The study used two research activities (a laboratory experiment and an interview) and two research methods (multiple choice for 6-alternative-forced-choice and multiple choice for rank-order) to investigate which colour a participant would choose if asked to select a product to purchase when there is a range of colours available. Participants were also asked to provide a reason for their decisions. The study finds that the stronger a participant's preference for a colour, the more likely they are to purchase a product in that colour. The data from interviews suggests that, for some of the products tested, participants are highly influenced by the colour association that they would purchase a product-colour on their one of the colour association than other colours. The updated conceptual framework suggests that the colour association factor could be one of the product-colour decision primary factors that influence consumer product-purchase intentions in the absence of consumer personal colour preferences.
The domain evolution and photodetection performance degradation of α-In2Se3 nanoflakes induced by the total dose effect of 60Co γ-rays are investigated.
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