Enhanced Light Absorption of Silicon Nanotube Arrays for Organic/Inorganic Hybrid Solar Cells

Abstract

By combining nanoimprint lithography technique and a two-step lift-off process, a Si nanotube array is fabricated and applied as a light absorber for n-Si/PEDOT:PSS hybrid solar cells. The light is effectively trapped within the nanotubes and the device reveals a Jsc of 29.9 mA · cm(-2) and a power conversion efficiency of 10.03%, which is an enhancement of 13.4% compared to the cell having the best-known Si architecture of nanocones as a light absorber to date.

Measurement of minority carrier lifetime in infrared photovoltaic detectors using parallel circuit method

“…On the other hand, the smaller devices effective minority carrier lifetime decrease with decreasing area suggests presence of significant perimeter surface recombination effects. This result is coincidence with previous works (Jeong et al 2014). …”

Preparation of silicon nanomaterials by arc discharge

“…Metallic (armchair) and semiconductor (zigzag and mixed) characteristics of SiNTs have been demonstrated by first-principle calculations [79]; and metallic single-walled SiNTs were reported, using ab initio calculations [76]. Although some papers have been published on the preparation of the SiNTs by other methods [80][81][82][83][84][85][86][87][88], there are few papers in which the arc discharge method was adopted. But as a whole, it seems that the studies on the SiNTs may be developed rapidly in the coming years (the number of literatures in the online database of SCI in last five years is about half of the total literatures since 2000).…”

Enhanced Electro‐Optical Properties of Nanocone/Nanopillar Dual‐Structured Arrays for Ultrathin Silicon/Organic Hybrid Solar Cell Applications

“…Even under the unsatisfi ed coverage conditions, our best cell shows a PCE over 12%, which is suffi ciently higher than previously reported PEDOT:PSS/Si cells that constructed either on structured or planar bulk c-Si without extra modifi cations. [ 8,33,34 ] In this research, this optimized NC-NPs array is directed by the optical simulation, which has not be electrical optimized. To further increase the V oc and the ultimate effi ciency, optimum control of the structure parameters and interfacial passivation should be applied.…”

“…[ 9,33 ] This is the crucial reason that the fi nal effi ciency of these structured cells is always lower than the planar one. As to solve this problem, necessary structure modulation should be applied, such as this wet chemical etching reconstructed NC-NPs array.…”