Efficient and stable operation of nonfullerene organic solar cells: retaining a high built-in potential
Efficient and stable operation of nonfullerene organic solar cells: retaining a high built-in potential
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DOI：
10.1039/d0ta08018g
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发表时间：
2020-10
影响因子：
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通讯作者：
Yiwen Wang;Jiayin Han;Linfeng Cai;Ning Li;Zhe Li;F. Zhu
中科院分区：
文献类型：
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作者：
Yiwen Wang;Jiayin Han;Linfeng Cai;Ning Li;Zhe Li;F. Zhu
这项工作报告了我们的研究工作，以提高非富勒烯有机太阳能电池（OSC）的操作稳定性，通过保持一个稳定的和高的内置电位跨越体异质结（BHJ）。通过抑制BHJ与聚（3，4-乙撑二氧噻吩）-聚苯乙烯磺酸盐（PEDOT：PSS）空穴传输层（HTL）之间的界面反应，实现了OSC中稳定的内建电位。研究了界面改性、氧化钼（MoO 3）诱导的PEDOT：PSS HTL氧化掺杂对聚[（2，6-（4，8-双（5-（2-乙基己基-3-氟）噻吩-2-基）-苯并[1，2-B：4，5-B′]二噻吩））-alt-（5，5-（1′，3 ′-二-2-噻吩基-5 ′，7 ′-二（2-乙基己基）苯并[1′，2 ′-c：4′，5 ′-c′]二噻吩-4，8-二酮））]（PBDB-T-2F）：3，9-二（2-亚甲基-（（3-（1，1-二氰基亚甲基）-6，7-二氟）-茚满酮））-5，5，1,1，1,1-四分析了（4-己基苯基）-二噻吩并[2，3-d：2′，3 ′-d′]-s-引达省并[1，2-B：5，6-B′]二噻吩（IT-4 F）非富勒烯OSC。我们发现，MoO 3诱导的氧化掺杂在PEDOT：PSS中可以有效地抑制IT-4F和PEDOT：PSS之间的界面化学反应，这是最近发现的具有2-（3-氧代-2，3-二氢茚-1-亚基）丙二腈部分的非富勒烯受体（NFA）的OSC的主要降解机制。我们的研究结果强调了保持高内在潜力以减轻任何相关降解机制的重要性，以伴随NFA分子合成的快速发展，从而增强基于NFA的OSC的操作稳定性。
This work reports our research efforts to improve the operational stability of nonfullerene organic solar cells (OSCs) by retaining a stable and high built-in potential across the bulk heterojunction (BHJ). The stable built-in potential in the OSCs is realized through suppression of the interfacial reaction between the BHJ and poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) hole transporting layer (HTL). The impact of interfacial modification, molybdenum oxide (MoO3) induced oxidation doping of the PEDOT:PSS HTL, on the operational stability of poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))] (PBDB-T-2F): 3,9-bis(2-methylene-((3-(1,1-dicyanomethylene)-6,7-difluoro)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (IT-4F) nonfullerene OSCs has been analyzed. We found that the MoO3-induced oxidation doping in PEDOT:PSS can effectively suppress the interfacial chemical reactions between IT-4F and PEDOT:PSS, a recently identified major degradation mechanism in nonfullerene acceptor (NFA) with 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile moieties-based OSCs. Our findings highlight the importance of retaining high built-in potential to mitigate any associated degradation mechanisms, to accompany the rapid advances in the molecular synthesis of NFAs, toward enhanced operational stability of NFA-based OSCs.