Fabrication of CdSe Nano-Tetrapod Sensitized TiO₂ Nanotube Arrays for Quantum Dot-Sensitized Solar Cell Applications

Recent Progress on Metal Chalcogenide Semiconductor Tetrapod-Shaped Colloidal Nanocrystals and their Applications in Optoelectronics

“…Alternatively, they used a molecular linker, 3-mercaptopropionic acid (MPA), for anchoring quantum dots onto the semiconducting material. The device with the molecular linker mediator showed enhanced absorbance; under 100 mW/cm 2 light illumination, the device displayed a photocurrent density of 1.396 mA/cm 2 with the CdSe–MPA–TiO 2 electrode …”

“…The device with the molecular linker mediator showed enhanced absorbance; under 100 mW/cm 2 light illumination, the device displayed a photocurrent density of 1.396 mA/cm 2 with the CdSe−MPA−TiO 2 electrode. 120 Further progress has been carried out by Tong et al when they demonstrated immobilization of type-II CdSe/CdTe tetrapod NCs on oleylamine-functionalized reduced graphene oxide (rGO) sheets, which can be homogeneously mixed with an organic dye (PCDTBT) to form donor−acceptor dispersed heterojunctions; they observed a respectable power conversion efficiency of 3.3% in solar cell devices, as depicted in Figure 38. 111 This high efficiency is attributed to the aminefunctionalized rGO sheets, which allow intimate contact with the tetrapod NCs and efficient dispersal in the organic matrix, contributing to highly efficient charge separation and transfer at the tetrapod NC, rGO, and polymer interfaces.…”

Mescoporous Nickel Titanate–Titanium Oxide Complex Material for Enhanced Energy Storage Application

“…However, supercapacitors have high power density but lack sufficient energy density compared to Li-ion batteries, which can be increased by increasing either specific capacitance or operating voltage. , Storage capacity of electrode material is known to depend on the specific surface area of material, which is often related to the size/dimension of the material . Depending upon the porosity, material can be classified into two categories such as mesoporous (pore size: 2–50 nm) and microporous (pore size: up to 2 nm); collectively mesoporous and microporous material is classified as mescoporous. − The porosity of material enhances the charge storage capability by decreasing the charge transfer resistance by facilitate the electrolyte ion diffusion into the inner surface of electrode material. Based on the charge storage mechanism, supercapacitors are classified into two categories such as electric double-layer supercapacitors (non-Faradaic or EDLC) and pseudocapacitors (Faradaic). − Further, supercapacitor devices are classified as symmetric supercapacitors and asymmetric supercapacitors based on the electrode material .…”