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Interface Modification and Exceptionally Fast Regeneration in Copper Mediated Solar Cells Sensitized with Indoline Dyes
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-01-22 , DOI: 10.1021/acs.jpcc.9b11778 Adam Glinka 1 , Mateusz Gierszewski 1 , Błażej Gierczyk 2 , Gotard Burdziński 1 , Hannes Michaels 3 , Marina Freitag 3, 4 , Marcin Ziółek 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-01-22 , DOI: 10.1021/acs.jpcc.9b11778 Adam Glinka 1 , Mateusz Gierszewski 1 , Błażej Gierczyk 2 , Gotard Burdziński 1 , Hannes Michaels 3 , Marina Freitag 3, 4 , Marcin Ziółek 1
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The photovoltaic performance of solar cells sensitized with indoline D205 dye and its new derivative comprising an alkoxysilyl anchoring unit (D205Si) in the [Cu(tmby)2](TFSI)2/1 (tmby = 4,4′,6,6′-tetramethyl-2,2′-bipyridine, TFSI = bis(trifluoromethane)sulfonimide) redox couple mediated systems was studied in the presence of various titania/dye/electrolyte interface modifications. Cucurbit[7]uril (CB7) was employed to encapsulate dye molecules, creating an electronically insulating layer, suppressing electron interception by redox mediator, and leading to the increase in the electron lifetime in the titania conduction band. For example, the electron lifetime increased from 2.2 to 6.5 ms upon CB7 encapsulation of D205 cells at 0.9 V voltage. Further, molecular multicapping was optimized to minimize dye desorption and prevent electron recombination. As a result, photovoltaic performance was found to be enhanced by the interface modifications in most cases, especially when applied to the alkoxysilyl anchoring derivative. The charge transfer processes (dye regeneration, titania-dye and titania-redox mediator recombination) in the above-mentioned system and in the reference [Co(bpy)3](TFSI)3/2 (bpy = 2,2′-bipyridine) redox couple mediated systems were investigated by means of small light perturbation electron lifetime measurements, electrochemical impedance spectroscopy, and nanosecond and femtosecond transient absorption spectroscopies. Indoline dyes were also found to be outstandingly fast regenerated by the Cu-based mediator (time constant shorter than 100 ns), which may open new opportunities for sensitizer improvements.
中文翻译：
铜介导的染料敏化的铜介导太阳能电池的界面修饰和异常快速的再生
吲哚啉D205染料及其新衍生物在[Cu（tmby）2 ]（TFSI）2/1中包含烷氧基甲硅烷基锚定单元（D205Si）敏化的太阳能电池的光伏性能（tmby = 4,4'，6,6'-四甲基-2,2'-联吡啶，TFSI =双（三氟甲烷）磺酰亚胺）氧化还原对介导的系统在各种二氧化钛/染料/电解质界面修饰的存在下进行了研究。葫芦[7] uril（CB7）用于包裹染料分子，形成电子绝缘层，抑制电子被氧化还原介体拦截，并导致二氧化钛导带中的电子寿命增加。例如，在0.9 V电压下D205电池的CB7封装后，电子寿命从2.2毫秒增加到6.5毫秒。此外，优化了分子多重封端以最大程度地减少染料解吸并防止电子重组。结果，发现在大多数情况下，尤其是当将其应用于烷氧基甲硅烷基锚定衍生物时，通过界面改性可以提高光伏性能。3 ]（TFSI）3/2（bpy = 2,2'-联吡啶）氧化还原对介导的系统通过小光扰动电子寿命测量，电化学阻抗谱以及纳秒和飞秒瞬态吸收光谱法进行了研究。铜基介体还发现吲哚啉染料具有出色的快速再生能力（时间常数小于100 ns），这可能为敏化剂的改进提供了新的机会。
更新日期：2020-01-23
中文翻译：
铜介导的染料敏化的铜介导太阳能电池的界面修饰和异常快速的再生
吲哚啉D205染料及其新衍生物在[Cu（tmby）2 ]（TFSI）2/1中包含烷氧基甲硅烷基锚定单元（D205Si）敏化的太阳能电池的光伏性能（tmby = 4,4'，6,6'-四甲基-2,2'-联吡啶，TFSI =双（三氟甲烷）磺酰亚胺）氧化还原对介导的系统在各种二氧化钛/染料/电解质界面修饰的存在下进行了研究。葫芦[7] uril（CB7）用于包裹染料分子，形成电子绝缘层，抑制电子被氧化还原介体拦截，并导致二氧化钛导带中的电子寿命增加。例如，在0.9 V电压下D205电池的CB7封装后，电子寿命从2.2毫秒增加到6.5毫秒。此外，优化了分子多重封端以最大程度地减少染料解吸并防止电子重组。结果，发现在大多数情况下，尤其是当将其应用于烷氧基甲硅烷基锚定衍生物时，通过界面改性可以提高光伏性能。3 ]（TFSI）3/2（bpy = 2,2'-联吡啶）氧化还原对介导的系统通过小光扰动电子寿命测量，电化学阻抗谱以及纳秒和飞秒瞬态吸收光谱法进行了研究。铜基介体还发现吲哚啉染料具有出色的快速再生能力（时间常数小于100 ns），这可能为敏化剂的改进提供了新的机会。
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