1403/01/10

رضا اوجانی

مرتبه علمی: استاد
ارکید:
تحصیلات: دکترای تخصصی
اسکاپوس:
دانشکده: دانشکده شیمی
نشانی:
تلفن: 011 35302350

مشخصات پژوهش

عنوان
Solar Energy Storage by a Heterostructured BiVO4−PbOx Photocapacitive Device
نوع پژوهش
JournalPaper
کلیدواژه‌ها
photocapacitive device heterostructured BiVO4−PbOx solar energy storage
سال
2017
مجله ACS Energy Letters
شناسه DOI
پژوهشگران Saeid Safshekan ، Isaac Herraiz-Cardona ، Derialys Cardenas-Morcoso ، Reza Ojani ، Marta Haro ، Sixto Gimenez

چکیده

The development of solar energy storage strategies is a key step for handling the inherent variability of sunlight within a global solar-based energy model. In the present study, we have developed a photocapacitive device based on the heterostructured BiVO4−PbOx system. BiVO4 provides the photoactive core of the device, while PbOx nanoparticles (formed by the controlled oxidation of colloidal PbS quantum dots) furnish a capacitive platform by redox pseudocapacitance. The synergistic coupling of these two systems leads to high capacitance under illumination, which can be subsequently released in the dark. This integrated device exhibits excellent behavior in terms of solar light harvesting (band gap in the visible region ∼2.4 eV), with a specific capacitance of 6 mF cm−2 (4.5 mF cm−2 at discharge current density of 0.015 mA cm−2), high open-circuit potential (1.5 V vs RHE), and stable charge−discharge cycling during 100 cycles, opening promising research avenues in the development of novel solar energy conversion−storage strategies.