Vacuum-Deposited Bifacial Perovskite Solar Cells,ACS Energy Letters

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Vacuum-Deposited Bifacial Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-27 , DOI: 10.1021/acsenergylett.4c01536
Abhyuday Paliwal ₁ , Kassio P S Zanoni ₁ , Cristina Roldán-Carmona ₁ , Nathan Rodkey ₁ , Henk J Bolink ₁

Affiliation

Bifacial perovskite solar cells (Bi-PSCs) require thick perovskite layers to sufficiently absorb higher wavelength light. Also, it is critical to know which electrode (top or bottom) can more efficiently harvest the direct incident solar irradiance. Here, fully vacuum-deposited Bi-PSCs are reported with perovskite layer thicknesses ranging from ∼720 nm to 1.3 μm. With an optimized ITO top-electrode, the Bi-PSCs generated higher current density under top-illumination by >1 mA/cm², attaining the highest value of 24.98 mA/cm². The best Bi-PSC exhibited an efficiency of 19.6% under top-illumination and 18.71% under bottom-illumination, resulting in a high bifaciality factor of ∼0.95. Furthermore, even after employing cover glass encapsulation on the top-electrode, the Bi-PSCs still produced higher current density from top-illumination. Upon bifacial illumination using simulated 1-Sun light as the main illumination and a white LED light albedo of ∼0.21, the champion Bi-PSC demonstrated a current density value of ∼30.00 mA/cm².

中文翻译：

真空沉积双面钙钛矿太阳能电池

双面钙钛矿太阳能电池（Bi-PSC）需要厚的钙钛矿层才能充分吸收更高波长的光。此外，了解哪个电极（顶部或底部）可以更有效地收集直接入射的太阳辐照度也至关重要。据报道，完全真空沉积的 Bi-PSC 的钙钛矿层厚度范围为 720 nm 至 1.3 μm。通过优化的ITO顶电极，Bi-PSC在顶部照明下产生了>1 mA/cm ²的更高电流密度，达到了24.98 mA/cm ²的最高值。最好的 Bi-PSC 在顶部照明下表现出 19.6% 的效率，在底部照明下表现出 18.71% 的效率，从而产生约 0.95 的高双面系数。此外，即使在顶部电极上采用盖玻璃封装后，Bi-PSC 仍然通过顶部照明产生更高的电流密度。在使用模拟 1-Sun 光作为主要照明和~0.21 的白光 LED 光反照率的双面照明下，冠军 Bi-PSC 表现出~30.00 mA/cm ²的电流密度值。

更新日期：2024-08-27

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