Measurement of hole mobility in P3HT based photovoltaic cell using space charge limited current method

Kumary, K. L. Usha; Pratheek, M.; Hameed, T. A. Shahul; Predeep, P.

doi:10.1063/1.5130352

Cited by 2 publications

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References 16 publications

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“…With annealing at higher temperatures, μ h decreased to 1.47 × 10 −4 cm 2 V −1 s −1 when annealed at 210 °C for 30 min. The μ h at the 120 °C annealing condition is on par with the unannealed μ h of well-known conjugated polymer poly(3-hexylthiophene) (P3HT) 49 and is similar to our previous NCPEP studies, confirming that high μ h can be achieved with isotactic NCPEPs.…”

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confidence: 86%

Contrasting the Charge Carrier Mobility of Isotactic, Syndiotactic, and Atactic Poly((N-carbazolylethylthio)propyl methacrylate)

2021

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Isotactic nonconjugated pendant electroactive polymers (NCPEPs) have recently shown potential to achieve comparable charge carrier mobilities with conjugated polymers. Here we report the broader influence of tacticity in NCPEPs, using poly((N-carbazolylethylthio)propyl methacrylate) (PCzETPMA) as a model polymer. We utilized the thiol–ene reaction as an efficient postpolymerization functionalization method to achieve pendant polymers with high isotacticity and syndiotacticity. We found that a stereoregular isotactic polymer showed ∼100 times increased hole mobility (μh) as compared to both atactic and low molecular weight syndiotactic PCzETPMA, achieving μh of 2.19 × 10–4 cm2 V–1 s–1 after annealing at 120 °C. High molecular weight syndiotactic PCzETPMA gave ∼10 times higher μh than its atactic counterpart, comparable to isotactic PCzETPMA after annealing at 150 °C. Importantly, high molecular weight syndiotactic PCzETPMA showed a dramatic increase in μh to 1.82 × 10–3 cm2 V–1 s–1 when measured after annealing at 210 °C, which surpassed the well-known conjugated polymer poly(3-hexylthiophene) (P3HT) (μh = 4.51 × 10–4 cm2 V–1 s–1). MD simulations indicated short-range π–π stacked ordering in the case of stereoregular isotactic and syndiotactic polymers. This work is the first report of charge carrier mobilities in syndiotactic NCPEPs and demonstrates that the tacticity, annealing conditions, and molecular weight of NCPEPs can strongly affect μh.

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confidence: 86%

Contrasting the Charge Carrier Mobility of Isotactic, Syndiotactic, and Atactic Poly((N-carbazolylethylthio)propyl methacrylate)

2021

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“…4e and S5b† show the hole mobility ( μ h ) of the hole-only devices, which is calculated by the space charge limited current (SCLC) method. 37 The 2PACz-based device exhibits the smallest μ h of 6.39 × 10 −6 cm 2 V −1 s −1 , which could relate to its poor hole injection performance. Nevertheless, the 2PACz/MoO 3 -based device gives a μ h of 3.06 × 10 −3 cm 2 V −1 s −1 , which is higher than that of the MoO 3 -based device (2.20 × 10 −3 cm 2 V −1 s −1 ).…”

Section: Resultsmentioning

confidence: 97%

Simultaneous improvement of efficiency and stability of inverted organic solar cellviacomposite hole transport layer

et al. 2022

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Measurement of hole mobility in P3HT based photovoltaic cell using space charge limited current method

Cited by 2 publications

References 16 publications

Contrasting the Charge Carrier Mobility of Isotactic, Syndiotactic, and Atactic Poly((N-carbazolylethylthio)propyl methacrylate)

Contrasting the Charge Carrier Mobility of Isotactic, Syndiotactic, and Atactic Poly((N-carbazolylethylthio)propyl methacrylate)

Simultaneous improvement of efficiency and stability of inverted organic solar cellviacomposite hole transport layer

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