The ongoing energy transition to curb carbon dioxide emissions and meet the increasing demands have enhanced need for integration of renewable into existing electricity system. Solar has been gaining an market share over past decade. Multi-junction solar cells (MJSCs) enable efficient conversion sunlight without being bound by 33% limit as in commercialized single junction silicon cells. III-V ...

Abstract Charge-transporting layers (CTLs) are important in determining the performance and stability of perovskite solar cells (PSCs). Recently, there has been considerable use self-assembled monolayers (SAMs) as charge-selective contacts, especially for hole-selective SAMs inverted PSCs well involving tandem cells. The SAM-based contact shows many advantages over traditional thin-film organic...

In this paper we used two free-metal organic dyes (dye 1 and dye 2) based on indigo and thioindigo with cyanoacrylic acid as the electron acceptor group. The proposed dyes were sensitized from naphalene as the starting material by standard reactions and characterized by different analytical techniques and UV-Visible spectroscopy after purification. Spectrophotometric measurements of the organic...

Thermodynamic, achievable, and realistic efficiency limits of solar-driven electrochemical conversion of water and carbon dioxide to fuels are investigated as functions of light-absorber composition and configuration, and catalyst composition. The maximum thermodynamic efficiency at 1-sun illumination for adiabatic electrochemical synthesis of various solar fuels is in the range of 32-42%. Sing...

Triple-junction a-Si based solar cells, having a structure of SS/Ag/ZnO/n/n/b/a-SiGe-i/b/p/p/n/n/b/a-SiGei/b/p/p/n/n/a-Si-i/p/p/ITO, are fabricated at the University of Toledo using a multi-chamber, load-locked PECVD system. We studied the effect of heavily doped p and n layers deposited at the tunnel junction interfaces between the top and middle component cells and between the middle and bott...

Metal halide perovskites have rapidly enabled a range of high-performance photovoltaic technologies. However, catastrophic failure under reverse voltage bias poses roadblock for their commercialization. In this work, we conduct series stress tests to compare the reverse-bias stability perovskite single-junction, silicon and monolithic perovskite/silicon tandem solar cells. We demonstrate that t...

Organic-inorganic perovskite structures in which lead is substituted by tin are exceptional candidates for broadband light absorption. Herein we present a thorough analysis of the optical properties of CH3NH3Sn x Pb1-x I3 films, providing the field with definitive insights about the possibilities of these materials for perovskite solar cells of superior efficiency. We report a user's guide base...

-Advanced thin film processing and packaging technologies are employed in the fabrication of new planar thinfilm multifunction thermal converters. The processing, packaging, and design features build on experience gained from prior NIST demonstrations of thin-film converters and are optimized for improved sensitivity, bandwidth, manufacturability, and reliability.