Efficient, dopant free phenazine based hole transporting materials for high performance perovskite solar cells

Gurulakshmi, M.; Gade, Ramesh; Ahemed, Jakeer; Susmitha, K.; Simhachalam, Narendra Babu; Chetti, Prabhakar; Pola, Someshwar; Raghavender, M.

doi:10.1016/j.solener.2021.08.055

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…A water splitting battery based on the PEC technology has the potential to alleviate both energy and environmental issues. 185–190 Nonetheless, previous reports on 2D conjugated polymers were unsuitable for PEC application owing to their ineffective light harvesting and wide optical energy gap. 191–194 In view of this, Feng and co-workers 195 described a variety of novel sp 2 -carbon-linked 2D conjugated polymers 78–80 with excellent optoelectronic performance.…”

Section: Organic Framework Materialsmentioning

confidence: 99%

Design strategies and applications of novel functionalized phenazine derivatives: a review

Che

Lin

et al. 2022

J. Mater. Chem. C

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Section: Organic Framework Materialsmentioning

confidence: 99%

Design strategies and applications of novel functionalized phenazine derivatives: a review

Che

Lin

et al. 2022

J. Mater. Chem. C

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“…According to Hückel's law, the corresponding phenazine cation becomes even more stable [30]. In recent years, researchers have linked several functional groups with specific properties to phenazine groups to obtain more characteristic functionalized phenazine derivatives [31][32][33][34][35]. Integrating the unique performance of phenazine with the virtues provided by the introduced moiety not only promotes the evolution of phenazine derivatives but also enriches their variety and applications among intelligent substances.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Phenazine-Based Redox Center for High-Performance Polymer Poly(aryl ether sulfone)-5,10-Diphenyl-dihydrophenazine

Wang,

Zhai

et al. 2024

Molecules

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Phenazine-based redox-active centers are capable of averting chemical bond rearrangements by coupling during the reaction process, leading to enhanced stabilization of the material. When introduced into a high-performance polymer with excellent physicochemical properties, they can be endowed with electrochemical properties and related prospective applications while maintaining the capabilities of the materials. In this study, a facile C-N coupling method was chosen for the synthesis of serial poly(aryl ether sulfone) materials containing phenazine-based redox-active centers and to explore their electrochemical properties. As expected, the cyclic voltammetry curves of PAS-DPPZ-60, which basically overlap after thousands of cycles, indicate the stability of the electrochemical properties. As an electrochromic material, the transmittance change in PAS-DPPZ-60 exhibits only a slight attenuation after as long as 600 cycles. Meanwhile, as an organic battery cathode material, PAS-DPPZ has a theoretical specific capacity of 126 mAh g−1, and the capacity retention rate is 82.6% after 100 cycles at a 0.1 C current density. The perfect combination of advantageous features between phenazine and poly(aryl ether sulfone) is considered to be the reason for the favorable electrochemical performance of the material series.

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“…Small molecules with a donor-π-acceptor (D-π-A) structure, where the electron donor and electron acceptor moieties are connected via a conjugated π-bridge, have already been employed as an effective approach to design promising HTMs with tunable energy levels and high hole mobility [23][24][25][26]. D-π-A molecular backbones generally exhibit an intramolecular charge transfer (ICT) character, allowing charge separation and strong dipole-dipole interactions, which can induce a specific molecular packaging [27,28].…”

Section: Introductionmentioning

confidence: 99%

D-π-A-Type Pyrazolo[1,5-a]pyrimidine-Based Hole-Transporting Materials for Perovskite Solar Cells: Effect of the Functionalization Position

et al. 2022

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Donor–acceptor (D–A) small molecules are regarded as promising hole-transporting materials for perovskite solar cells (PSCs) due to their tunable optoelectronic properties. This paper reports the design, synthesis and characterization of three novel isomeric D-π-A small molecules PY1, PY2 and PY3. The chemical structures of the molecules consist of a pyrazolo[1,5-a]pyrimidine acceptor core functionalized with one 3,6-bis(4,4′-dimethoxydiphenylamino)carbazole (3,6-CzDMPA) donor moiety via a phenyl π-spacer at the 3, 5 and 7 positions, respectively. The isolated compounds possess suitable energy levels, sufficient thermal stability (Td > 400 °C), molecular glass behavior with Tg values in the range of 127–136 °C slightly higher than that of the reference material Spiro-OMeTAD (126 °C) and acceptable hydrophobicity. Undoped PY1 demonstrates the highest hole mobility (3 × 10−6 cm2 V−1 s−1) compared to PY2 and PY3 (1.3 × 10−6 cm2 V−1 s−1). The whole isomers were incorporated as doped HTMs in planar n-i-p PSCs based on double cation perovskite FA0.85Cs0.15Pb(I0.85Br0.15)3. The non-optimized device fabricated using PY1 exhibited a power conversion efficiency (PCE) of 12.41%, similar to that obtained using the reference, Spiro-OMeTAD, which demonstrated a maximum PCE of 12.58% under the same conditions. The PY2 and PY3 materials demonstrated slightly lower performance in device configuration, with relatively moderate PCEs of 10.21% and 10.82%, respectively, and slight hysteresis behavior (−0.01 and 0.02). The preliminary stability testing of PSCs is also described. The PY1-based device exhibited better stability than the device using Spiro-OMeTAD, which could be related to its slightly superior hydrophobic character preventing water diffusion into the perovskite layer.

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Efficient, dopant free phenazine based hole transporting materials for high performance perovskite solar cells

Cited by 7 publications

References 33 publications

Design strategies and applications of novel functionalized phenazine derivatives: a review

Design strategies and applications of novel functionalized phenazine derivatives: a review

Synthesis and Characterization of Phenazine-Based Redox Center for High-Performance Polymer Poly(aryl ether sulfone)-5,10-Diphenyl-dihydrophenazine

D-π-A-Type Pyrazolo[1,5-a]pyrimidine-Based Hole-Transporting Materials for Perovskite Solar Cells: Effect of the Functionalization Position

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