Browsing by Author "Chiu, Chi-Lin"

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Diffusion-Free Organic Hole Selective Contacts for Silicon Solar Cells
(2019-01-01)
Li, Li-Yu
;
Chen, Chun-Heng
;
Chiu, Chi-Lin
;
Li, You-Lan
;
Meng, Hsin-Fei
The dopant-free carrier selective contacts (CSC) to replace the complex diffusion manufacturing are increasingly explored using a variety of different materials. In this work, we investigate various organic materials, including conductive polymer PEDOT: PSS, fluorescent polymers PFO and Green B, and small molecules DMFL-NPB, to serve as the hole selective con-tact (HSC). By analyzing the lifetime and implied open-circuit voltage, assessing of contact resistivity and band alignment, as well as the device efficiency, we evaluate the potential of soluble organic materials acting as the HSC. The results have shown that PEDOT: PSS could effectively passivate the silicon surface to increases the open-circuit voltage by 31 mV and the short-circuit current density by 2.9 mA/cm(2). Overall, the power conversion efficiency increases from 12.36% to 14.55%
Hybrid Organic Silicon Solar Cells Using a Carbon-Nanotube Doped PEDOT:PSS Hole Selective Layer
(2019-01-01)
Kuo, Li-Jung
;
Lee, Li-Yu
;
Chiu, Chi-Lin
;
Wu, Hsin-Lung
;
Chen, Yan-Syun
In this work, we employ carbon nanotube (CNT) doped PEDOT:PSS to increase the conductivity and evaluate the potential of CNT-doped PEDOT:PSS as a hole selective layer for conventional silicon solar cell. Two types of PEDOT: PSS noted as TC100, TC200 with a relative high and low CNT concentrations. The results have shown that PEDOT: PSS could effectively passivate the silicon surface. The contact resistivity for holes is also smaller than that for electrons on a polished surface. Finally, conventional solar cells with a polished or textured rear surfaces are incorporated with the TC100 and TC200. The results shown that the PEDOT:PSS increase the open-circuit voltage, and short-circuit current, compared to the reference cell. A power conversion efficiency of 14.55% has been achieved for the device with the TC100 hole selective layer.
Hybrid PEDOT: PSS - Silicon Solar Cell Packaging Employing Ultrathin Transparent Conductive Films
(2018-01-01)
Wu, Ching-Wen
;
Li, You-Lan
;
Chiu, Chi-Lin
;
Wu, Hsin-Lung
;
Kitazawa, Hiroyuki
In this work, we demonstrate the packaging of hybrid organic - silicon solar cell mini-modules employing flexible and ultrathin transparent conductive films. The unique engineering plastic substrates are printed with high-resolution, micrometer-scaled silver meshes to achieve superior optical transmittance and low sheet resistance, offering the efficient collection of charged carriers through distributed metallic grids. The width of silver grid can be as low as 3 mu m, which is a 10 to 15 fold reduction compared to the conventional grid width used in screen printing. By systematically comparing various substrate materials and process conditions, we achieve a power conversion efficiency of 9.5% on 2x2 cm(2) mini-modules.