Phase Transitions and Formation of a Monolayer-Type Structure in Thin Oligothiophene Films: Exploration with a Combined In Situ X-ray Diffraction and Electrical Measurements

Table 1 The unit cell parameters for the DH4T oligothiophene for the room-temperature crystalline phase

Sample	Monoclinic unit cell parameters
Evaporated DH4T	a = 6.0 Å, b = 7.8 Å, c = 28.5 Å, and β = 93.0°
Single crystal of DH4T [23]	a = 6.049 Å, b = 7.814 Å, c = 28.532 Å, and β = 92.39°
Fibers of DH4T [10]	a = 6.09 Å, b = 7.81 Å, c = 28.49 Å, and β = 91.9°