Role of n-type seed-layers in microstructural evolution of intrinsic nanocrystalline silicon and solar cell performance

2013 ◽  
Vol 13 (7) ◽  
pp. 1344-1349 ◽  
Author(s):  
Ji Eun Lee ◽  
Seungkyu Ahn ◽  
Joo Hyung Park ◽  
Jinsu Yoo ◽  
Kyung Hoon Yoon ◽  
...  
Keyword(s):  
Solar Cell ◽  
Microstructural Evolution ◽  
Nanocrystalline Silicon ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Seed Layers

scholarly journals Quantification of electron accumulation at grain boundaries in perovskite polycrystalline films by correlative infrared-spectroscopic nanoimaging and Kelvin probe force microscopy

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Ting-Xiao Qin ◽  
En-Ming You ◽  
Mao-Xin Zhang ◽  
Peng Zheng ◽  
Xiao-Feng Huang ◽  
...  
Keyword(s):  
Solar Cell ◽  
Grain Boundaries ◽  
Cell Performance ◽  
Kelvin Probe Force Microscopy ◽  
Light Illumination ◽  
Kelvin Probe ◽  
Solar Cell Performance ◽  
Force Microscopy ◽  
Infrared Spectroscopic

AbstractOrganic–inorganic halide perovskites are emerging materials for photovoltaic applications with certified power conversion efficiencies (PCEs) over 25%. Generally, the microstructures of the perovskite materials are critical to the performances of PCEs. However, the role of the nanometer-sized grain boundaries (GBs) that universally existing in polycrystalline perovskite films could be benign or detrimental to solar cell performance, still remains controversial. Thus, nanometer-resolved quantification of charge carrier distribution to elucidate the role of GBs is highly desirable. Here, we employ correlative infrared-spectroscopic nanoimaging by the scattering-type scanning near-field optical microscopy with 20 nm spatial resolution and Kelvin probe force microscopy to quantify the density of electrons accumulated at the GBs in perovskite polycrystalline thin films. It is found that the electron accumulations are enhanced at the GBs and the electron density is increased from 6 × 1019 cm−3 in the dark to 8 × 1019 cm−3 under 10 min illumination with 532 nm light. Our results reveal that the electron accumulations are enhanced at the GBs especially under light illumination, featuring downward band bending toward the GBs, which would assist in electron-hole separation and thus be benign to the solar cell performance.

On the Role of PTB7-Th:[70]PCBM Blend Concentration in ortho -Xylene on Polymer Solar-Cell Performance

2017 ◽  
Vol 5 (12) ◽  
pp. 2168-2174 ◽  
Author(s):  
Luigi Salamandra ◽  
Luca La Notte ◽  
Giorgia Paronesso ◽  
Gianpaolo Susanna ◽  
Lucio Cinà ◽  
...  
Keyword(s):  
Solar Cell ◽  
Polymer Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance

Elucidating the role of chlorine in perovskite solar cells

2017 ◽  
Vol 5 (16) ◽  
pp. 7423-7432 ◽  
Author(s):  
Lin Fan ◽  
Yi Ding ◽  
Jingshan Luo ◽  
Biao Shi ◽  
Xin Yao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Film Formation ◽  
Perovskite Solar Cells ◽  
Cell Performance ◽  
Solar Cell Performance

Chlorine incorporation and its configuration evolution during perovskite film formation were studied, as well as its effect on solar cell performance.

Correlation of Hydrogen Dilution Profiling to Material Structure and Device Performance of Hydrogenated Nanocrystalline Silicon Solar Cells

2008 ◽  
Vol 1066 ◽  
Author(s):  
Baojie Yan ◽  
Guozhen Yue ◽  
Yanfa Yan ◽  
Chun-Sheng Jiang ◽  
Charles W. Teplin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Cell Structure ◽  
Nanocrystalline Silicon ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Seeding Layer ◽  
Single Junction ◽  
Junction Solar Cell ◽  
Hydrogen Dilution

ABSTRACTWe present a systematic study on the correlation of hydrogen dilution profiles to structural properties materials and solar cell performance in nc-Si:H solar cells. We deposited nc-Si:H single-junction solar cells using a modified very high frequency (VHF) glow discharge technique on stainless steel substrates with various profiles of hydrogen dilution in the gas mixture during deposition. The material properties were characterized using Raman spectroscopy, X-TEM, AFM, and C-AFM. The solar cell performance correlates well with the material structures. Three major conclusions are made based on the characterization results. First, the optimized nc-Si:H material does not show an incubation layer, indicating that the seeding layer is well optimized and works as per design. Second, the nanocrystalline evolution is well controlled by hydrogen dilution profiling in which the hydrogen dilution ratio is dynamically reduced during the intrinsic layer deposition. Third, the best nc-Si:H single-junction solar cell was made using a proper hydrogen dilution profile, which caused a nanocrystalline distribution close to uniform throughout the thickness, but with a slightly inverse nanocrystalline evolution. We have used the optimized hydrogen dilution profiling and improved the nc-Si:H solar cell performance significantly. As a result, we have achieved an initial active-area cell efficiency of 9.2% with a nc-Si:H single-junction structure, and 15.4% with an a-Si:H/a-SiGe:H/nc-Si:H triple-junction solar cell structure.

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