Investigation of new carbazole based metal-free dyes as active photo-sensitizers/co-sensitizers for DSSCs

Naik, Praveen; Su, Rui; El‐Shafei, Ahmed; Adhikari, Airody Vasudeva

doi:10.1016/j.dyepig.2017.09.068

Cited by 60 publications

(16 citation statements)

References 50 publications

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“…Further, co‐sensitized devices were fabricated in presence of 20 mM of chenodeoxycholic acid (CDCA) as a co‐adsorbent using the 0.2 and 0.3 mM of co‐sensitizer N,N‐PABA with 0.2 and 0.3 mM of N3 sensitizer. The devices are fabricated using the Doctor Blade method as per the reported procedure and their details are given in electronic supplementary information (ESI).…”

Section: Resultsmentioning

confidence: 92%

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

et al. 2018

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In this work, we report a comprehensive photovoltaic investigation of a structurally simple Donor‐Acceptor (D−A) configured organic dye, N,N‐PABA as an active co‐sensitizer in DSSCs sensitized with well‐known Ru (II) based N3 dye. This effective co‐sensitizer (N,N‐PABA) comprises N,N‐dimethylaniline system as a donor scaffold linked with 4‐aminobenzoic acid as an electron withdrawing functionality. In the present study, we have demonstrated the profound effect of concentration of sensitizer, i. e. N3 based dye as well as co‐sensitizer, i. e. N,N‐PABA on the photovoltaic performance characteristics of solar cells. Interestingly, the best photovoltaic performance was obtained for the co‐sensitized device fabricated using 0.2 mM of N,N‐PABA along with 0.3 mM of N3 sensitizer, in presence of 20 mM of CDCA. It displayed power conversion efficiency (PCE) of 5.82% with JSC of 14.35 mA.cm−2, VOC of 0.626 V and FF of 64.85%. Here, the N,N‐PABA effectively filled the absorption valley, avoided the dye aggregation and reduced the charge recombination in the co‐sensitized devices. Thus, the results ameliorate the role of efficient co‐sensitizers to yield DSSC with improved performance by the selection of a matchable co‐sensitizer at an appropriate concentration.

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Section: Resultsmentioning

confidence: 92%

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

et al. 2018

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“…displayed a V OC of 0.693 V, J SC of 10.3 mA cm −2 , and PCE of 4.44%. Further, Naik et al 77 reported three new dyes (28-30) containing CZ as donor scaffold, CA acceptor units with vinylene π-bridge, and a 4-methoxyphenyl unit as an auxiliary donor. The findings revealed that among the three dyes, dye 28 demonstrated a maximum PCE of 2.20% due to the presence of a CA acceptor unit.…”

Section: Cz-based Monoanchoring Dyesmentioning

confidence: 99%

Recent developments in metal‐free organic sensitizers derived from carbazole, triphenylamine, and phenothiazine for dye‐sensitized solar cells

et al. 2021

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Summary In the present context of increasing population, renewable and sustainable energy alternatives are very much essential to satisfy the necessities of the world. To satisfy this growing demand, scientists are prioritizing the production of cost‐effective and high‐performance clean energy appliances. Dye‐sensitized solar cells (DSSCs) are one such material that is at the forefront of modern solar cell technologies. Being one of the main components of DSSCs, metal‐free organic dyes play a crucial role in light processing and electron injection. In recent times, carbazole (CZ)‐, triphenylamine (TPA)‐, and phenothiazine (PTZ)‐based derivatives have been identified as suitable alternatives to Ru(II) polypyridyl complexes because they are easy to synthesize and exhibit excellent thermal and electronic properties. This review focuses largely on the latest developments in the use of monoanchored and multianchored CZ, TPA, and PTZ scaffolds for DSSC applications and focuses especially on the correlation between molecular design and photovoltaic performance. The physical properties of devices can be adjusted through the sensitizer's strategic design that helps to improve the performance of the devices. We tabulated the photovoltaic parameters corresponding to all dyes presented in this review. Also, applications of additives are presented after the systematic review on CZ‐, TPA‐, and PTZ‐based dyes.

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“…Recently, Naik et al [173] have observed over 8% efficiency by sensitizing a functionalized ruthenium complex dye (NCSU-10) with a carbazole organic dye and also with carbazole based chromophores. Same research group also used different metal-free carbazole dyes consisting with different units and achieved 8.32% efficiency by sensitizing with NCSU-10 [175]. Furthermore, the efficiency was exceeded over 9% with FF = 62.2% using carbazole dyes consisting of different electron acceptor/anchoring units [176].…”

Section: Role Of Organic Dyes In Co-sensitizationmentioning

confidence: 99%

“…Besides, aggregation also minimized by the sensitization of a long chain co-sensitizer in a suitable solvent [134]. Aggregation effect of dyes could also be minimized by the addition of additives like chenodeoxycholic acid (CDCA), cholic acid and octanoic acid through which improved performance is possible [15,47,150,163,[174][175][176][177]185]. In contrast of these findings, Gräf et al [65] found that the H and J aggregates bathochromically shift J bands (tilted orientation) and hypsochromically shift H bands (parallel orientation) of the aggregates of the squaraine dye with significant contribution to photocurrent.…”

Section: Role Of Phthalocyanine Dyes In Co-sensitizationmentioning

confidence: 99%

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

et al. 2019

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Novel materials for third generation solar cells have emerged as one of the major scientific contribution in alternative energy approaches. In this scenario, semiconductor nanomaterials and organic dye molecules have greatly acknowledged for their vast contribution to the solar energy applications. Research on semiconductor nanomaterials for fabricating future generation solar cells is still fascinating due to their extraordinary structural and optical properties. Moreover, functionalization of organic dye molecules helps to harvest large amount of photons in order to apply them for high efficiency solar cell devices. Various attempts have been made to improve efficiency of quantum dot-sensitized solar cells and dye-sensitized solar cells using semiconductor inorganic nanomaterials and organic/organometallic dye molecules. Out of these, co-sensitization has been looking as most promising approach to improve the efficiency considerably. A record of over 14% of efficiency has been achieved in recent years through co-sensitization strategy. The energy transfer process during co-sensitization is also a very crucial and interesting. This review deals about materials, methods, various approaches and role of co-sensitization in enhancing the efficiency of dye-sensitized and quantum dot sensitized solar cells. The critical issues existing in the co-sensitization approach are also elaborately discussed.

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Investigation of new carbazole based metal-free dyes as active photo-sensitizers/co-sensitizers for DSSCs

Cited by 60 publications

References 50 publications

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

Recent developments in metal‐free organic sensitizers derived from carbazole, triphenylamine, and phenothiazine for dye‐sensitized solar cells

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

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