通过参数优化,使截断锥形QD-IBSCs的效率达到50%以上

IF 5.6 2区 物理与天体物理 Q1 OPTICS
Naveed Jafar, Jianliang Jiang, Bitri Rea, Krishna Krishna, Hengli Zhang
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引用次数: 0

摘要

量子点中间带太阳能电池(QD-IBSCs)作为一种通过两步双光子吸收来提高太阳能电池效率的有前途的方法受到了广泛的关注。使用qd - ibsc解决了Shockley-Queisser限制,这是太阳能电池商业化的一个挑战。在这项研究中,我们采用了一种有效的方法来提高QD-IBSCs的太阳能电池效率,即利用截锥形量子点(TCQD)的形状。通过几何参数、带隙、电子亲和、掺杂浓度、吸收层厚度和载流子迁移率的变化,对称地考察了对TCQD-IBSC性能的影响。有趣的是,TCQD-IBSC的效率为51.1%,随着带隙、掺杂浓度和电子亲和度的增加,效率分别下降到12.3%、14.1%和26%。值得注意的是,我们将吸收层厚度增加到330 nm,载流子迁移率增加到4000 cm2V−1s−1,从而提高了短路电流密度,从而提高了太阳能电池的功率转换效率(PCE)。此外,量子点大小与点间距之间存在权衡关系。随着温度的升高,PCE从49%逐渐降低到41.4%。该模型结构为实现高效TCQD-IBSCs提供了新的方向,并可能促进下一代高效太阳能电池的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Achieving over 50% efficiency in truncated conical QD-IBSCs through parameter optimization

Quantum dot intermediate band solar cells (QD-IBSCs) have attracted significant attention as a promising approach to enhance solar cell efficiency by two-step two-photon absorption. The Shockley-Queisser limitation has been resolved by using QD-IBSCs, which was a challenge for solar cell commercialization. In this study, we employed an efficient approach in QD-IBSCs to enhance the solar cell efficiency by using the truncated conical quantum dot (TCQD) shape. The effect on the performance of TCQD-IBSC has been symmetrically examined by varying the geometrical parameters, band gap, electron affinity, doping concentration, absorber layer thickness, and carrier mobility. Interestingly, TCQD-IBSC showed an efficiency of 51.1%, which decreases to 12.3%, 14.1%, and 26% with the increase in bandgap, doping concentration, and electron affinity, respectively. Notably, we improved the short-circuit current density by increasing the thickness of the absorber layer to 330 nm and carrier mobility to 4000 cm2V−1s−1, which led to higher power conversion efficiencies (PCE) of the solar cell. Moreover, a trade-off relation has been observed between QD size and interdot spacing. The PCE is gradually decreased from 49 % to 41.4 % with the increase in temperature. This model structure provides a new direction toward the achievement of high-efficiency TCQD-IBSCs and may promote the development of next-generation solar cells with high efficiency.

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来源期刊
EPJ Quantum Technology
EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
7.70
自引率
7.50%
发文量
28
审稿时长
71 days
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.
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