6.5% Certified Efficiency Sb2Se3 Solar Cells Using PbS Colloidal Quantum Dot Film as Hole-Transporting Layer,ACS Energy Letters

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6.5% Certified Efficiency Sb2Se3 Solar Cells Using PbS Colloidal Quantum Dot Film as Hole-Transporting Layer
ACS Energy Letters ( IF 19.3 ) Pub Date : 2017-08-25 00:00:00 , DOI: 10.1021/acsenergylett.7b00648
Chao Chen _{1,

2,

3} , Liang Wang _{1,

2,

3} , Liang Gao _{1,

2,

3} , Dahyun Nam ₄ , Dengbing Li _{1,

2,

3} , Kanghua Li _{1,

2,

3} , Yang Zhao _{1,

2,

3} , Cong Ge _{1,

2,

3} , Hyeonsik Cheong ₄ , Huan Liu ₂ , Haisheng Song _{1,

2} , Jiang Tang _{1,

2,

3}

Affiliation

Sb₂Se₃ is a promising candidate for thin-film photovoltaics, with a suitable band gap, benign grain boundaries, Earth-abundant and nontoxic constituents, and excellent stability. However, the low doping density (10¹³ cm^–3) of Sb₂Se₃ absorber and back contact barrier limit its efficiency. Here we introduced a PbS colloidal quantum dot (CQD) film as the hole-transporting layer (HTL) to construct a n-i-p configured device and overcame these problems. Through simulation-guided optimization, we have significantly improved the efficiency of a Sb₂Se₃ thin-film solar cell to a new certified record of 6.5%. The PbS CQD HTL not only minimized carrier recombination loss at the back contact and boosted carrier collection efficiency but also contributed photocurrent by its own near-infrared absorption. Furthermore, these n-i-p devices also demonstrated improved device uniformity, achieving 6.39% in a 1.02 cm² device.

中文翻译：

使用PbS胶体量子点薄膜作为空穴传输层的经认证的具有6.5％效率的Sb ₂ Se ₃太阳能电池

Sb ₂ Se ₃是薄膜光伏的有希望的候选者，具有合适的带隙，良性的晶界，富含地球和无毒的成分以及出色的稳定性。但是，Sb ₂ Se ₃吸收剂和背接触势垒的低掺杂密度（10 ¹³ cm ^–3）限制了其效率。在这里，我们介绍了一种PbS胶体量子点（CQD）膜作为空穴传输层（HTL），以构造压区配置的器件并克服了这些问题。通过仿真指导的优化，我们显着提高了Sb ₂ Se ₃的效率薄膜太阳能电池的新认证记录为6.5％。PbS CQD HTL不仅使背面接触处的载流子重组损失最小化，并提高了载流子收集效率，还通过其自身的近红外吸收贡献了光电流。此外，这些压区装置还显示出改善的装置均匀性，在1.02 cm ^2的装置中达到6.39％。

更新日期：2017-08-25

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