Cation exchange synthesis of AgBiS$_2$ quantum dots for highly efficient solar cells
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916218261209088 |
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| author | Senina, Alina Prudnikau, Anatol Wrzesińska-Lashkova, Angelika Vaynzof, Yana Paulus, Fabian |
| author_facet | Senina, Alina Prudnikau, Anatol Wrzesińska-Lashkova, Angelika Vaynzof, Yana Paulus, Fabian |
| contents | Silver bismuth sulfide (AgBiS$_2$) nanocrystals have emerged as a promising eco-friendly, low-cost solar cell absorber material. Their direct synthesis often relies on the hot-injection method, requiring the application of high temperatures and vacuum for prolonged times. Here, we demonstrate an alternative synthetic approach via a cation exchange reaction. In the first-step, bis(stearoyl)sulfide is used as an air-stable sulfur precursor for the synthesis of small, monodisperse Ag2S nanocrystals at room-temperature. In a second step, bismuth cations are incorporated into the nanocrystal lattice to form ternary AgBiS$_2$ nanocrystals, without altering their size and shape. When implemented into photovoltaic devices, AgBiS$_2$ nanocrystals obtained by cation exchange reach power conversion efficiencies of up to 7.35%, demonstrating the efficacy of the new synthetic approach for the formation of high-quality, ternary semiconducting nanocrystals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_14426 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cation exchange synthesis of AgBiS$_2$ quantum dots for highly efficient solar cells Senina, Alina Prudnikau, Anatol Wrzesińska-Lashkova, Angelika Vaynzof, Yana Paulus, Fabian Materials Science Applied Physics Silver bismuth sulfide (AgBiS$_2$) nanocrystals have emerged as a promising eco-friendly, low-cost solar cell absorber material. Their direct synthesis often relies on the hot-injection method, requiring the application of high temperatures and vacuum for prolonged times. Here, we demonstrate an alternative synthetic approach via a cation exchange reaction. In the first-step, bis(stearoyl)sulfide is used as an air-stable sulfur precursor for the synthesis of small, monodisperse Ag2S nanocrystals at room-temperature. In a second step, bismuth cations are incorporated into the nanocrystal lattice to form ternary AgBiS$_2$ nanocrystals, without altering their size and shape. When implemented into photovoltaic devices, AgBiS$_2$ nanocrystals obtained by cation exchange reach power conversion efficiencies of up to 7.35%, demonstrating the efficacy of the new synthetic approach for the formation of high-quality, ternary semiconducting nanocrystals. |
| title | Cation exchange synthesis of AgBiS$_2$ quantum dots for highly efficient solar cells |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2404.14426 |