More Like this

1. In Situ Biomineralization of Cu x Zn y Sn z S 4 Nanocrystals within TiO 2 -Based Quantum Dot Sensitized Solar Cell Anodes

   https://doi.org/10.1021/acsami.9b15545  

   Sadeghnejad, Abdolhamid ; Lu, Li ; Cline, Joseph ; Ozdemir, Nur K. ; Snyder, Mark A. ; Kiely, Christopher J. ; McIntosh, Steven ( November 2019 , ACS Applied Materials & Interfaces)
2. Rationally Engineered Vertically Aligned β ‐Ga 2− x W x O 3 Nanocomposites for Self‐Biased Solar‐Blind Ultraviolet Photodetectors with Ultrafast Response

   https://doi.org/10.1002/admt.202300014  

   Das, Debabrata ; Sanchez, Francelia ; Barton, Dallin J. ; Tan, Susheng ; Shutthanandan, Vaithiyalingam ; Devaraj, Arun ; Ramana, Chintalapalle V. ( May 2023 , Advanced Materials Technologies)

   With the astonishing advancement of present technology and increasing energy consumption, there is an ever‐increasing demand for energy‐efficient multifunctional sensors or transducers based on low‐cost, eco‐friendly material systems. In this context, self‐assembled vertically alignedβ‐Ga_2−xW_xO₃nanocomposite (GWO‐VAN) architecture‐assisted self‐biased solar‐blind UV photodetection on a silicon platform, which is the heart of traditional electronics is presented. Utilizing precisely controlled growth parameters, the formation of W‐enriched verticalβ‐Ga_2−xW_xO₃nanocolumns embedded into the W‐deficientβ‐Ga_2−xW_xO₃matrix is reached. Detailed structural and morphological analyses evidently confirm the presence ofβ‐Ga_2−xW_xO₃nanocomposite with a high structural and chemical quality. Furthermore, absorption and photoluminescence spectroscopy explains photo‐absorption dynamics and the recombination through possible donor–acceptor energy states. The proposed GWO‐VAN framework facilitates evenly dispersed nanoregions with asymmetric donor energy state distribution and thus forms build‐in potential at the verticalβ‐Ga_2−xW_xO₃interfaces. As a result, the overall heterostructure evinces photovoltaic nature under the UV irradiation. A responsivity of ≈30 A/W is observed with an ultrafast response time (≈350 µs) under transient triggering conditions. Corresponding detectivity and external quantum efficiency are 7.9 × 10¹²Jones and 1.4 × 10⁴%, respectively. It is believed that, while this is the first report exploiting GWO‐VAN architecture to manifest self‐biased solar‐blind UV photodetection, the implication of the approach is enormous in designing electronics for extreme environment functionality and has immense potential to demonstrate drastic improvement in low‐cost UV photodetector technology.

    

   more » « less
3. Inorganic CsPb 1− x Sn x IBr 2 for Efficient Wide‐Bandgap Perovskite Solar Cells

   https://doi.org/10.1002/aenm.201800525  

   Li, Nan ; Zhu, Zonglong ; Li, Jiangwei ; Jen, Alex K. ‐Y. ; Wang, Liduo ( May 2018 , Advanced Energy Materials)

   Recently, the stability of organic–inorganic perovskite thin films under thermal, photo, and moisture stresses has become a major concern for further commercialization due to the high volatility of the organic cations in the prototype perovskite composition (CH₃NH₃PbI₃). All inorganic cesium (Cs) based perovskite is an alternative to avoid the release or decomposition of organic cations. Moreover, substituting Pb with Sn in the organic–inorganic lead halide perovskites has been demonstrated to narrow the bandgap to 1.2–1.4 eV for high‐performance perovskite solar cells. In this work, a series of CsPb_1−xSn_xIBr₂perovskite alloys via one‐step antisolvent method is demonstrated. These perovskite films present tunable bandgaps from 2.04 to 1.64 eV. Consequently, the CsPb_0.75Sn_0.25IBr₂with homogeneous and densely crystallized morphology shows a remarkable power conversion efficiency of 11.53% and a highV_ocof 1.21 V with a much improved phase stability and illumination stability. This work provides a possibility for designing and synthesizing novel inorganic halide perovskites as the next generation of photovoltaic materials.

    

   more » « less
4. Effects of intrinsic and atmospherically induced defects in narrow bandgap (FASnI 3 ) x (MAPbI 3 ) 1−x perovskite films and solar cells

   https://doi.org/10.1063/1.5126867  

   Subedi, Biwas ; Li, Chongwen ; Junda, Maxwell M. ; Song, Zhaoning ; Yan, Yanfa ; Podraza, Nikolas J. ( February 2020 , The Journal of Chemical Physics)
5. High-density InAs/GaAs 1− x Sb x quantum-dot structures grown by molecular beam epitaxy for use in intermediate band solar cells

   https://doi.org/10.1063/1.4943631  

   Debnath, M. C. ; Mishima, T. D. ; Santos, M. B. ; Cheng, Y. ; Whiteside, V. R. ; Sellers, I. R. ; Hossain, K. ; Laghumavarapu, R. B. ; Liang, B. L. ; Huffaker, D. L. ( March 2016 , Journal of Applied Physics)