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首页> 外文期刊>Advanced Functional Materials >Solar Cells with Enhanced Photocurrent Efficiencies Using Oligoaniline-Crosslinked Au/CdS Nanoparticles Arrays on Electrodes
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Solar Cells with Enhanced Photocurrent Efficiencies Using Oligoaniline-Crosslinked Au/CdS Nanoparticles Arrays on Electrodes

机译：在电极上使用寡苯胺交联的Au / CdS纳米颗粒阵列提高光电流效率的太阳能电池

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摘要

Different configurations of CdS nanoparticles (NPs) are linked to Au electrodes by electropolymerization of thioaniline-functionalized CdS NPs onto thioaniline-functionalized Au-electrodes. In one configuration, thioaniline-functionalized CdS NPs are electropolymerized in the presence of thioanline-modified Au NPs to yield an oligoaniline-crosslinked CdS/Au NPs array. The NP-functionalized electrode generates a photocurrent with a quantum yield that corresponds to ca. 9%. The photocurrent intensities are controlled by the potential applied on the electrode, and the redox-state of the oligoaniline bridge. In the oxidized quinoide state of the oligoaniline units, the bridges act as electron acceptors that trap the conduction-band electrons that are transported to the electrode and lead to high quantum yield photocurrents. The reduced π-donor oligoaniline bridges act as π-donor sites that associate N,N'-dimethyl-4,4'-bipyridinium, MV~(2+), by donor/acceptor interactions, K_a = 5270 M~(-1). The associated MV~(2+) acts as an effective trap of the conduction-band electrons, andin the presence of triethanolamine (TEOA) as an electron donor, high photocurrent values are measured (ca. 12% quantum yield). The electropolymerization of thioaniline-functionalized Au NPs and thioaniline-modified CdS NPs in the presence of MV~(2+) yields a MV~(2+)-imprinted NP array. The imprinted array exhibits enhanced affinities toward the association of MV~(2+) to the oligoaniline π-donor sites, K_a = 2.29 × 10~4 M~(-1). This results in the effective trapping of the conduction-band electrons and an enhanced quantum yield of the photocurrenl, ca. 34%. The sacrificial electron donor, TEOA, was substituted with the reversible donor I_3~-. A solar cell consisting of the imprinted CdS/Au NPs array, with MV~(2+) and I_3~-, was constructed. The cell generated a photocurrent with a quantum yield of 4.7%.
机译：通过将硫代苯胺官能化的CdS NPs电聚合到硫代苯胺官能化的Au电极上，将不同结构的CdS纳米颗粒（NPs）连接到Au电极。在一种构型中，将硫代苯胺官能化的CdS NP在硫代苯胺改性的Au NPs存在下进行电聚合，以生成寡聚苯胺交联的CdS / Au NPs阵列。 NP功能化的电极产生的光电流的量子产率约为ca。 9％。光电流强度由施加在电极上的电势以及寡苯胺桥的氧化还原状态控制。在低聚苯胺单元的氧化喹啉状态下，电桥充当电子受体，捕获传输到电极的导带电子，并导致高量子产率光电流。还原的π供体低聚苯胺桥充当通过供体/受体相互作用将N，N'-二甲基-4,4'-联吡啶鎓MV〜（2+）结合的π供体位点，K_a = 5270 M〜（-1 ）。关联的MV〜（2+）充当导带电子的有效陷阱，并且在三乙醇胺（TEOA）作为电子供体的情况下，测得的光电流值很高（量子产率约为12％）。在MV〜（2+）存在下，硫代苯胺官能化的Au NPs和硫代苯胺修饰的CdS NPs的电聚合产生了MV〜（2+）印迹的NP阵列。印迹阵列对MV〜（2+）与低聚苯胺π-供体位点的缔合具有增强的亲和力，K_a = 2.29×10〜4 M〜（-1）。这导致导带电子的有效俘获和光子晶体的量子产率提高。 34％。牺牲电子供体TEOA被可逆的供体I_3〜-取代。构造了由压印的CdS / Au NPs阵列和MV〜（2+）和I_3〜-组成的太阳能电池。该电池产生了光电流，量子产率为4.7％。

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