Reilly Caroline E, Dillon Robert J, Nayak Animesh, Brogan Shane, Moot Taylor, Brennaman Matthew K, Lopez Rene, Meyer Thomas J, Alibabaei Leila
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.
Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.
ACS Appl Mater Interfaces. 2021 Apr 7;13(13):15261-15269. doi: 10.1021/acsami.1c00933. Epub 2021 Mar 21.
A core-shell approach that utilizes a high-surface-area conducting core and an outer semiconductor shell is exploited here to prepare p-type dye-sensitized solar energy cells that operate with a minimal applied bias. Photocathodes were prepared by coating thin films of nanocrystalline indium tin oxide with a 0.8 nm AlO seeding layer, followed by the chemical growth of nonstoichiometric strontium titanate. Films were annealed and sensitized with either a porphyrin chromophore or a chromophore-catalyst molecular assembly consisting of the porphyrin covalently tethered to the ruthenium complex. The sensitized photoelectrodes produced cathodic photocurrents of up to -315 μA/cm under simulated sunlight (AM1.5G, 100 mW/cm) in aqueous media, pH 5. The photocurrent was increased by the addition of regenerative hole donors to the system, consistent with slow interfacial recombination kinetics, an important property of p-type dye-sensitized electrodes.
本文采用一种核壳结构方法，利用高比表面积的导电核和外层半导体壳来制备在最小外加偏压下工作的p型染料敏化太阳能电池。通过用0.8 nm的AlO种子层涂覆纳米晶氧化铟锡薄膜，然后进行非化学计量钛酸锶的化学生长来制备光阴极。对薄膜进行退火处理，并用卟啉发色团或由共价连接到钌配合物的卟啉组成的发色团 - 催化剂分子组装体进行敏化。在pH为5的水性介质中，在模拟太阳光（AM1.5G，100 mW/cm²）下，敏化光电极产生的阴极光电流高达 -315 μA/cm²。通过向系统中添加再生空穴供体，光电流增加，这与缓慢的界面复合动力学一致，这是p型染料敏化电极的一个重要特性。
