Recent advances in perovskite optoelectronics highlight their exceptional potential for photodetection applications, leveraging their outstanding light-harvesting capabilities and solution-processability. In this work, we demonstrate a self-powered perovskite photodetector featuring an optimized p-i-n architecture, utilizing RbCsMAFAPb(IBr)3 as the photoactive layer with 4PACz and C60 as hole and electron transport layers, respectively. The devices exhibit remarkable performance metrics, including a peak external quantum efficiency (EQE) of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_16086_Article_IEq1.gif" Format="GIF" Height="6" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">$\sim$</EquationSource> <EquationSource Format="MATHML"><math> <mo>∼</mo> </math></EquationSource> </InlineEquation>73% and a responsivity of 0.39 A/W at 695 nm, accompanied by a specific detectivity of 2.05<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_16086_Article_IEq2.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">$\times$</EquationSource> <EquationSource Format="MATHML"><math> <mo>×</mo> </math></EquationSource> </InlineEquation>10<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_16086_Article_IEq3.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">$^{11}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>11</mn> </mmultiscripts> </math></EquationSource> </InlineEquation> Jones across the 690–780 nm spectral range. With a high-speed response characterized by a time constant of 79.57 <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10854_2025_16086_Article_IEq4.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="12" /> </InlineMediaObject> <EquationSource Format="TEX">$\upmu$</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">μ</mi> </math></EquationSource> </InlineEquation>s and an operational bandwidth exceeding 2 kHz, the photodetector shows excellent suitability for high-speed applications. The entirely solution-processed fabrication approach combined with self-powered operation presents a promising pathway toward scalable, energy-efficient optoelectronic devices.

High-responsivity, fast, self-powered p-i-n architecture-based mixed halide mixed cation perovskite photodetectors

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发表日期：

2025年11月3日

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Surya Ketaraju,
Naba Kumar Rana,
Santu Mazumder,
Nikhil Chander

摘要

Recent advances in perovskite optoelectronics highlight their exceptional potential for photodetection applications, leveraging their outstanding light-harvesting capabilities and solution-processability. In this work, we demonstrate a self-powered perovskite photodetector featuring an optimized p-i-n architecture, utilizing RbCsMAFAPb(IBr)₃ as the photoactive layer with 4PACz and C₆₀ as hole and electron transport layers, respectively. The devices exhibit remarkable performance metrics, including a peak external quantum efficiency (EQE) of $\sim$ $\sim$ 73% and a responsivity of 0.39 A/W at 695 nm, accompanied by a specific detectivity of 2.05 $\times$ $\times$ 10 $^{11}$ $^{11}$ Jones across the 690–780 nm spectral range. With a high-speed response characterized by a time constant of 79.57 $\upmu$ $μ$ s and an operational bandwidth exceeding 2 kHz, the photodetector shows excellent suitability for high-speed applications. The entirely solution-processed fabrication approach combined with self-powered operation presents a promising pathway toward scalable, energy-efficient optoelectronic devices.