Oxidized pentacene micro-rods obtained by thermal annealing of pentacene thin films in air

Morphology-Dependent Optoelectronic Properties of Pentacene Nanoribbon and Nanosheet Crystallite

“…As shown in Figure 1 a, the crystals grown at 180 °C display a nanoribbon-like morphology with four right angles. The morphology of the product is highly consistent with previous research [ 41 , 42 ]. The length of the nanoribbon crystal is approximately 60 μm, with a width of ~3 μm (thick ~50 nm, see in Figure 1 b).…”

“…From Figure 1 c,f, it can be clearly seen that the nanoribbon has a clear fluorescence signal, while the sheet has no obvious fluorescence intensity. This particular optical difference has previously been reported in a similar way [ 41 , 42 , 43 ]. The quality of single crystals can be measured by a polarizing test.…”

“…In fact, polycrystalline pentacene has been reported in many references [ 38 , 39 , 40 , 41 ]. Previous experiments have developed pentacene with nanoribbon or nanosheet configurations, but the presented analysis of different photoelectric phenomena was insufficiently comprehensive [ 41 , 42 , 43 ].…”

Organic photodetectors based on pentacene single crystals with fast response and flexibility

“…32), due to band tail absorption of crystal, which arises from the surface oxide and structure defects. 33,34 The specific detectivity ( D *, units cm Hz 1/2 W −1 ) reflects the detection capability of the photodetector to weak light. It can be calculated by using the responsivity ( R ), the device area ( A = 11.2 × 23.5 μm 2 ), and the noise current ( i n ) , where NEP is noise equivalent power (units W Hz −1/2 ) and Δ f is the electrical bandwidth of 1 Hz.…”