Experimental investigation of charge transfer, charge extraction, and charge carrier concentration in P3HT:PBD-DT-DPP:PC70BM ternary blend photovoltaics

Rao, Arun D.; Murali, M. G.; Kesavan, Arul Varman; Ramamurthy, Praveen C.

doi:10.1016/j.solener.2018.09.072

Cited by 13 publications

(8 citation statements)

References 22 publications

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“…Because the exciton diffusion length in P3HT is very short (20–25 nm), most of the photogenerated excitons were harvested in the P3HT participate in geminate recombination (Figure S9e). The comparative literature presented in Table S3 with data from devices fabricated using ternary P3HT:PCBM photoactive layers containing different nanomaterials and polymers clearly shows that perovskite NC is the best candidate to improve the PCE of the widely investigated P3HT:PCBM-based devices. − …”

Section: Resultsmentioning

confidence: 96%

Charge Transport between Coaxial Polymer Nanorods and Grafted All-Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency

et al. 2019

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The versatile optoelectronic properties of perovskite nanocrystals (NCs) have provided a strong surge for their utilization in different classes of solar cells, with organic photovoltaic systems being no exception. In an unprecedented approach, a hybrid solar cell with CsPbBr 1.5 I 1.5 NCs strategically grafted on poly(3-hexylthiophene-2,5-diyl) (P3HT) nanorods (NRs) is shown to have a photoconversion efficiency of 9.72 ± 0.4%, with only 1.5 wt % NCs. The improvement is twice more than the P3HT:PCBM reference devices (4.09 ± 0.2%). The choice of NC composition is validated by density functional theory calculations, which show decent charge carrier mobility in CsPbBr 1.5 I 1.5 , besides having better stability than CsPbI 3 , making CsPbBr 1.5 I 1.5 NCs a suitable contender for hybrid device architecture. A trivial blending of the NCs in the P3HT:PCBM matrix results in their nonuniform distribution, escalating charge carrier trapping, albeit maintaining a device efficiency of 8.07 ± 0.3% with 1 wt % NCs. Uniform NC grafting is propitious over inhomogeneous blending because CsPbBr 1.5 I 1.5 NCs not only act as additional light harvesters, but their chemical grafting onto the P3HT NRs improves the charge transport by creating better charge percolation pathways. The higher crystallinity of the P3HT NRs than P3HT also helps in reducing the trap states.

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Section: Resultsmentioning

confidence: 96%

Charge Transport between Coaxial Polymer Nanorods and Grafted All-Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency

et al. 2019

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“…These processes modify the spatial reorganization of the polymer chain and fullerene molecule. Solar cell device performance mainly depends on the active layer deposition condition from its blend solution and post deposition process such as solvent selection, thin film solidification rate, thermal annealing of solidified film, vapor annealing of active layer (Kesavan et al, 2019;Rao et al, 2018). Either pre-deposition process or post deposition process, the ultimate goal is to improve crystallinity in the blends layer and to get the optimum phase separation in P3HT and PC 61 BM.…”

Section: Introductionmentioning

confidence: 99%

Enhancing optical absorption by reducing the trap states in polymer semiconductor processed for solar cell

2023

Self Cite

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“…Bulk heterojunction (BHJ) PSCs based on conjugated conducting polymers and fullerene composites have advanced rapidly in power conversion efficiency (PCE) in recent decades through the morphology control [10][11][12][13], use of smart architectures [14][15][16], and interfacial engineering [17][18][19][20][21]. Among these approaches, interfacial engineering is a powerful tool to achieve high-performing PSC devices [22].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Nitrogen and Phosphorus Codoped Carbon Dot Interfacial Modification Layer for Efficient Charge Transfer between ZnO Electron Transport Layer and PTB7:PC70BM Active Layer

Tafese

Aga

Thothadri

et al. 2023

International Journal of Energy Research

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The interface between the active layer and the charge-transporting layer is critical for performance improvement in polymer solar cells (PSCs). The use of zinc oxide (ZnO) as an electron transport layer (ETL) in PSCs was limited due to inherent defects in the surface of ZnO prepared by the sol-gel method, mismatched energy bands with the photoactive layer, and incompatibility between the photoactive layer and ZnO ETL. In this study, nitrogen and phosphorus codoped carbon dots (N & P-CDs) were prepared from Ensete ventricosum (false banana) and used as an interfacial modification layer for ZnO ETL. The inverted devices with structures ITO/ZnO/N & P-CD/PTB7:PC70BM/Al were fabricated to investigate the charge transfer dynamic between the active layer and ETL interface modification with N & P-CDs. We have observed that the interfacial modification between the ZnO ETL and the active layer, using N & P-CDs, improves the charge transfer between ZnO ETL and PTB7:PC70BM active layer. The obtained result shows that the ETL/BHJ interface resistance of the devices with ZnO:undoped CDs, ZnO:N-CDs, ZnO:P-CDs, and ZnO:N & P-CD ETLs decreases dramatically from 103.4 to 84.04, 78.16, 37.88, and 28.9 Ω, respectively. This is due to the improvement of charge extraction efficiency by smoothing ZnO surface defects and minimizing the band mismatch between the active layer and ZnO using N & P-CDs. The results indicate that the water-soluble N & P-CDs developed in this study have the potential to be used for efficient free charge carrier extraction for PSCs.

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Experimental investigation of charge transfer, charge extraction, and charge carrier concentration in P3HT:PBD-DT-DPP:PC70BM ternary blend photovoltaics

Cited by 13 publications

References 22 publications

Charge Transport between Coaxial Polymer Nanorods and Grafted All-Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency

Charge Transport between Coaxial Polymer Nanorods and Grafted All-Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency

Enhancing optical absorption by reducing the trap states in polymer semiconductor processed for solar cell

Hydrothermal Synthesis of Nitrogen and Phosphorus Codoped Carbon Dot Interfacial Modification Layer for Efficient Charge Transfer between ZnO Electron Transport Layer and PTB7:PC70BM Active Layer

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