Graphene oxide modified PEDOT:PSS as an efficient hole transport layer for enhanced performance of hybrid silicon solar cells

Highly Efficient and Stable Organic Solar Cells Enabled by a PEDOT:PSS/HxMoO3 Hybrid Hole Transport Layer

“…The bands at 1259 and 1366 cm –1 correspond to the C α = C α inter-ring stretching mode and the C β = C β stretching mode of PEDOT, respectively. The C α = C β symmetric stretching mode belonging to the thiophene ring in PEDOT shows a characteristic peak at 1437 cm –1 . , The Raman spectra of PEDOT:PSS before and after doping show the change of the peak position, which indicates that there is a strong intermolecular interaction between PEDOT:PSS and H x MoO 3 . Herein, the Raman spectra of the C α = C β symmetric stretching mode of PEDOT are deconvolutioned into different components by a Gaussian function.…”

“…The C α = C β symmetric stretching mode belonging to the thiophene ring in PEDOT shows a characteristic peak at 1437 cm −1 . 40,41 The Raman spectra of PEDOT:PSS before and after doping show the change of the peak position, which indicates that there is a strong intermolecular interaction between PEDOT:PSS and ) and quinone (I q ) components to the total intensity (I t = I b + I q ), it can be seen that before and after doping H x MoO 3 in PEDOT:PSS, the value of I b /I t decreased from 0.12 to 0.07, and the quinone component in PEDOT increased relatively. This indicates that there is a molecularlevel interaction between H x MoO 3 and PEDOT:PSS, which weakens the electrostatic force between PEDOT and PSS, promotes the conversion of the PEDOT chain from the curled benzoyl structure to the linear quinone structure with better electrical conductivity, and enhances the charge transport capacity of the hybrid HTL.…”

Improved Photovoltaic Performance of GaAs/Carbon Nanotube Heterojunction Solar Cells with a Multifunctional Nafion/PEDOT:PSS Layer

“…The micro-Raman spectra of Nafion, NP2:1, and PEDOT:PSS are shown in Figure b. The bands located at ∼980, ∼1260, and ∼1360 cm –1 correspond to the oxyethylene ring deformation, the C–C interring vibrations, and the C–C stretching distortion of the PEDOT, respectively . A characteristic vibration band between 1400 and 1500 cm –1 represents the asymmetric stretching of C α C β at 1450 cm –1 and the symmetric stretching vibration of the C α C β band of the five-membered thiophene ring of PEDOT at 1417 cm –1 .…”

“…The bands located at ∼980, ∼1260, and ∼1360 cm −1 correspond to the oxyethylene ring deformation, the C−C interring vibrations, and the C−C stretching distortion of the PEDOT, respectively. 34 A characteristic vibration band between 1400 and 1500 cm −1 represents the asymmetric stretching of C α �C β at 1450 cm −1 and the symmetric stretching vibration of the C α �C β band of the five-membered thiophene ring of PEDOT at 1417 cm −1 . According to the Raman characteristics of PEDOT:PSS in the previous literature, 35 the peak between 1400 and 1450 cm −1 could be deconvoluted into quinoid C α −C β (−O) and benzoid C α �C β (−O) symmetric stretching forms of the PEDOT, which is centered at 1413 and 1446 cm −1 , respectively.…”

High efficiency flexible PEDOT:PSS/silicon hybrid heterojunction solar cells by employing simple chemical approaches

“…EG was added to improve the electrical conductivity of PEDOT:PSS and IPA (as a surfactant) to improve the wettability of the polymer with Si surface for conformal coating as well as to improve the electrical conductivity of the polymer layer. 18,19,24 The textured Si wafers were pre-heated for 30 s at B110 1C to grow an ultra-thin (B1.5 nm) SiO x layer. 22 The ultra-thin SiO x layer has three key roles: (i) acts as a tunnel layer for charge conduction at the interface of the organic layer and the Si substrate, (ii) provides interface passivation, and (iii) makes the Si surface hydrophilic for conformal coating of the polymer on the textured SiO x /Si substrates.…”